Image: Washington Examiner

Supreme Court Hears Challenge to Mississippi Mail Ballot Grace Period

26 March, 2026.USA.20 sources

Key Takeaways

Supreme Court hears Watson v. RNC challenging Mississippi's five-day late-ballot grace period.
Ruling could affect roughly a dozen states and Washington, D.C., on late ballots.
Court's conservative majority appears poised to reject Mississippi's law, limiting late-ballot counting.

Court Weighs Election Day Definition

The Supreme Court heard arguments in a case challenging Mississippi's five-day grace period for mail ballots.

The conservative majority appeared poised to strike down grace periods that affect 14 states and three territories.

ABC30 News

The RNC argued federal law sets Election Day as the deadline for when ballots must be received.

Conservative justices pressed on what constitutes casting a vote.

The case is part of the broader GOP effort to restrict mail voting.

Implications for Multiple States

The ruling could upend mail voting across roughly one-third of the country.

Washington state faces a total overhaul of its all-mail system before the midterms.

Balls and Strikes

The Fifth Circuit ruled that Election Day is the day by which ballots must be both cast and received.

Invalidating grace periods could also threaten early in-person voting.

The Court's decision will have massive consequences for federal elections.

Debate Over Federalism and State Authority

Mississippi Solicitor General Stewart framed the case as a federalism dispute.

“Washington — The Supreme Court on Monday wrestled with a involving whether federal law bars states from counting mail ballots that are postmarked by Election Day but received by election officials later”