Oz, McCormick at tie in PA with thousands of ballots out


              Ballot envelopes for the Pennsylvania primary election are seen after being processed at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              Ballot envelopes for the Pennsylvania primary election are seen after being processed at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              Ballot envelopes for the Pennsylvania primary election are seen after being processed at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              A Chester County election worker processes ballots for the Pennsylvania primary election at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              Election worker Monica Ging processes ballots for the Pennsylvania primary election at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              A Chester County election worker processes a ballot for the Pennsylvania primary election at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              Chester County election workers process ballots for the Pennsylvania primary election at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              A Chester County election worker processes ballots for the Pennsylvania primary election at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              Mehmet Oz, a Republican candidate for U.S. Senate in Pennsylvania, waves to supporters at a primary night election gathering in Newtown, Pa., Tuesday, May 17, 2022. (AP Photo/Seth Wenig)
            
              Election worker Monica Ging processes a ballot for the Pennsylvania primary election at the Chester County Voter Services office, Thursday, May 19, 2022, in West Chester, Pa. (AP Photo/Matt Slocum)
            
              Republican candidate for Pennsylvania U.S. Senate Dave McCormick talks 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)
Oz, McCormick at tie in PA with thousands of ballots out