The Supreme Court is expected to rule by July on whether states may count mail ballots arriving after Election Day, with 14 states and D.C. at risk of forced rule changes before the 2026 midterms.
The Supreme Court is expected to decide *Watson v. Republican National Committee* before July, a ruling that could prohibit states from counting mail ballots received after Election Day, even when those ballots carry a valid Election Day postmark [1]. The case arrives at a pivotal moment: November 2026 midterm elections are months away, and 14 states plus the District of Columbia currently accept late-arriving mail ballots under their own statutory frameworks [2]. A decision against those states would require swift, large-scale changes to election administration procedures before ballots are printed and mailed.
The case reached the Court after lower courts considered whether federal election law, specifically the statutes establishing a uniform Election Day, preempts state rules that extend the receipt deadline for mailed ballots [1]. The Republican National Committee is the named respondent, aligning it with challengers seeking to restrict the counting window. During oral arguments held in March, conservative justices signaled at minimum a receptiveness to the petitioners' position, though no majority view was publicly telegraphed [2]. The Court is expected to issue its opinion before its term closes, typically in late June or early July.
The substantive stakes are significant. If the Court holds that federal law fixes Election Day as the hard deadline for ballot receipt, states with extended receipt windows would lose authority to count any mail ballot arriving after polls close on Election Day, regardless of when that ballot was cast [1]. Election administrators in those 14 states and the District of Columbia would face compressed timelines to revise statutes, update voter guidance, and retrain poll workers before the November cycle [2]. The decision could also affect millions of voters who rely on the postal system and who historically mail ballots in the final days before an election, when delivery times are uncertain.
The ruling is expected by late June or early July 2026 [1]. States affected by an adverse holding would then face the question of whether emergency legislative sessions or administrative emergency rulemaking could produce compliant procedures before election deadlines attach. Litigation over implementation, including requests for injunctive relief and stays in individual states, is a foreseeable next step [2]. Election law practitioners and state attorneys general in the affected jurisdictions are watching the decision closely.