The Supreme Court ruled 5-4 on Monday that states can count mail-in ballots that arrive after Election Day, provided they were postmarked by Election Day — rejecting a Republican National Committee challenge to the practice. This decision affects more than a dozen states and preserves voting procedures just months before the 2026 midterm elections. The ruling comes as President Trump has repeatedly pushed to tighten mail-in ballot deadlines; the Court's decision directly contradicts his administration's position on the issue.