Deep-red Utah embraced voting by mail. Then came 2020.


              Utah Lt. Gov. Deidre Henderson poses for a photograph Thursday, April 14, 2022, in Salt Lake City. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Republican candidate for Utah County Clerk, Aaron Davidson, speaks during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Utah Lt. Gov. Deidre Henderson poses for a photograph Thursday, April 14, 2022, in Salt Lake City. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Utah County election division provisional ballot envelopes are shown during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Republican candidate for Utah County Clerk, Aaron Davidson, left, and outgoing Utah County Clerk, Josh Daniels, look on during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Utah County elections director Rozan Mitchell points to an example of a ballot needing adjudication during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Utah County elections director Rozan Mitchell conducts a tour of Utah County's elections equipment and review our processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              A accountability sign is shown hanging during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Utah County elections director Rozan Mitchell holds a guide to elections in Utah County during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              People look on during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Dewon Holt looks on during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Dewon Holt looks on during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              Utah County elections director Rozan Mitchell holds a "Election Heroes Work Here" sign during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
            
              A election worker holds an election envelope during a tour of Utah County's elections equipment and review processes for administering secure elections Tuesday, April 19, 2022, in Provo, Utah. In Utah and other Republican-led states, unsubstantiated election fraud claims have upended support for vote by-mail, a practice that not long ago was overwhelmingly popular among Republicans. (AP Photo/Rick Bowmer)
Deep-red Utah embraced voting by mail. Then came 2020.