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Vote counting drags on in Pennsylvania’s GOP Senate primary

Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mercer County Director of Elections, Thad Hall uses the optical scanner to continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, in Mercer, Pa.. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Election workers continue the process of counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) A bundle of mail-in ballots marked "Problem Return, (Outer) Envelopes" are set aside as election workers continue counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) An election worker continues the process in counting ballots for the Pennsylvania primary election, Wednesday, May 18, 2022, at the Mercer County Elections Board in Mercer, Pa. Vote counting continues as Republican candidates Dr. Mehmet Oz and David McCormick are locked in a too-early-to-call race for Pennsylvania's hotly contested Republican nomination for an open U.S. Senate seat. (AP Photo/Keith Srakocic) Mehmet Oz, a Republican candidate for U.S. Senate in Pennsylvania, speaks to supporters at a primary night election gathering in Newtown, Pa., Tuesday, May 17, 2022. (AP Photo/Seth Wenig) Republican candidate for a Pennsylvania U.S. Senate seat, Dave McCormick, right, and his wife Dinah Powell, talk to supporters during his returns watch party in the Pennsylvania primary election, Tuesday, May 17, 2022, in Pittsburgh. (AP Photo/Keith Srakocic) Republican candidate for a Pennsylvania U.S. Senate seat, Dave McCormick, right, and his wife Dinah Powell, talk to supporters as returns show a close race during his returns watch party in the Pennsylvania primary election, Tuesday, May 17, 2022, in Pittsburgh. (AP Photo/Keith Srakocic) Mehmet Oz, a Republican candidate for U.S. Senate in Pennsylvania, speaks to supporters at a primary night election gathering in Newtown, Pa., Tuesday, May 17, 2022. (AP Photo/Seth Wenig) Mehmet Oz, a Republican candidate for U.S. Senate in Pennsylvania, speaks to supporters at a primary night election gathering in Newtown, Pa., Tuesday, May 17, 2022. (AP Photo/Seth Wenig)
Vote counting drags on in Pennsylvania’s GOP Senate primary