The U.S. Supreme Court is set to hear crucial cases that may significantly impact mail-in voting procedures for upcoming elections, including the midterms and the 2026 elections. One case involving deadlines for late-arriving mail ballots could reshape the voting landscape, especially in states like Mississippi and Alaska, where grace periods for ballot counting are in debate. Former President Trump has made efforts to restrict mail-in voting, pushing this issue to the Supreme Court amidst challenges in Congress. The decisions reached by the court could lead to chaos in the electoral process if existing grace periods and mail-in ballot rules are altered, sparking concern over voter suppression and election security.