The Supreme Court heard oral argument in [Watson v. Republican National Committee], the Republican National Committee's challenge to a Mississippi law allowing mail-in ballots to be counted within five days of Election Day. Mississippi argued that federal law, precedent, and history supported its law that a ballot may be received by state officials after Election Day, as long as it was submitted by Election Day. But the RNC and other plaintiffs argued the opposite, contending that federal law required both submission and receipt of a ballot by Election Day. The district court ruled in favor of Mississippi, but the Fifth Circuit reversed and ruled for the RNC. This case occurred amid the upcoming 2026 midterm elections happening in November.