In this May 28, 2020, file photo, mail-in ballots are processed at the Chester County Voter Services office in West Chester, Pa., prior to the primary election. (AP Photo/Matt Rourke, File)
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In this May 28, 2020, file photo, mail-in ballots are processed at the Chester County Voter Services office in West Chester, Pa., prior to the primary election. (AP Photo/Matt Rourke, File)
