Watson v. RNC: The SCOTUS Case That Could Invalidate 750,000 Mail Ballots in November 2026

# Watson v. RNC: The SCOTUS Case That Could Invalidate 750,000 Mail Ballots in November 2026

> **Quick answer:** Watson v. Republican National Committee is a Supreme Court case challenging whether states can count mail ballots received after Election Day if they were postmarked on time. A ruling is expected by late June 2026 — months before the midterm elections. Election officials in 14 states and D.C. are warning the ruling could be "akin to a natural disaster" for election administration, with more than 750,000 ballots cast in 2024 now potentially invalid under the rule challengers are urging the Court to adopt. Native American and military voters face the sharpest exposure.

The Watson v. RNC SCOTUS mail ballot case is the most consequential election law decision the Supreme Court will hand down before November 2026 — and most voters have no idea it's coming. A majority of justices appeared ready during March oral arguments to overturn Mississippi's five-business-day grace period for late-arriving mail ballots, a move that would cascade across 14 states and Washington, D.C., and potentially erase hundreds of thousands of votes in the upcoming midterms.

*This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for legal matters.*

## What Watson v. RNC Actually Is

The case originates in Mississippi. In 2020, Mississippi enacted a law allowing mail-in ballots to be counted if they were postmarked by Election Day and received within five business days afterward. The Republican National Committee, joined by the Libertarian Party of Mississippi, sued, arguing that federal statutes designating the Tuesday after the first Monday in November as "election day" require all ballots to be in state custody by the close of polls on that specific day — not days later.