Many states count mail ballots that arrive after Election Day. Those grace periods could go away - AP News

Many states currently allow mail ballots postmarked by Election Day to be counted if they arrive days or weeks later, but legislation and legal challenges are threatening to eliminate those grace periods. The push to end late ballot counting reflects a broader Republican effort to tighten election rules, arguing that ballots should arrive by Election Day itself rather than after voting concludes. The outcome would potentially disenfranchise voters whose mail ballots are delayed in transit, particularly in rural areas and among military personnel stationed overseas who traditionally rely on mail voting. Several states have already moved toward stricter deadlines, while others face court battles over whether current grace periods comply with federal law. The issue has become a focal point in the wider debate over ballot access and election security heading into the 2026 midterm cycle.