EXPLAINER: How mailed ballots slow results in Pennsylvania


              Franklin County Director of Information Services Noll Witt loads mail-in and absentee ballots into a DS450 Ballot Scanner the morning after the Pennsylvania primary election at the Franklin County offices in Chambersburg, Pa., Wednesday, May 18, 2022. (AP Photo/ Carolyn Kaster)
            
              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)