Watson v. RNC

Watson v. RNC is a Supreme Court case argued on 23 March 2026, concerning whether states may allow mail ballots postmarked by election day to be counted if received within a grace period afterwards. During oral arguments, conservative justices showed particular scepticism toward mail voting grace periods, focusing on questions of uniformity and the risk of post-election ballot manipulation, and the Republican National Committee, as respondent, argued the grace period extensions passed during the COVID era had no subsequent legislative authorisation.

Watson v. RNC was one of four major election-law cases before the Court in the same term, alongside Louisiana v. Callais (VRA Section 2), NRSC v. FEC (campaign finance), and the Texas map stay. The cumulative weight of the docket made the 2025-26 term potentially the most consequential for election law since Bush v. Gore in 2000.

The Supreme Court ruled 5-4 on 29 June 2026 that Mississippi may count mail ballots postmarked by election day and received up to five business days later, upholding grace-period laws in 14 states and DC . The ruling ran against the direction conservative justices had signalled at oral argument, where scepticism of grace periods was the dominant tone; the RNC, which had argued for eliminating the practice nationally, lost.

The outcome protects roughly 4 million military and overseas voters who rely on the Federal Voting Assistance Program and often need extra transit time for ballots to arrive, along with voters in competitive states such as North Carolina, Georgia, and Pennsylvania. Watson v. RNC lands as the last of the term's major election-law rulings, arriving after Louisiana v. Callais and the Texas map stay had already reshaped the 2026 redistricting landscape; unlike those rulings, this one leaves the pre-existing mail-ballot rules for the midterms undisturbed rather than upending them.