Supreme Court Upholds Laws Counting Late-Arriving Mail-In Ballots
The Supreme Court upheld laws allowing counting of mail ballots arriving late within a grace period.
Why it matters: This ruling clarifies ballot-counting rules amid ongoing election disputes and affects mail-in voting for the 2026 midterms. Counsel and election officials must adjust strategies accordingly.
- The Court ruled 5-4 to uphold state laws allowing mail-in ballots postmarked by Election Day to be counted if received within a grace period.
- Mississippi's law permits counting ballots arriving up to five business days after Election Day; similar laws exist in 14 states and D.C.
- Justice Amy Coney Barrett wrote the majority opinion; Justice Samuel Alito authored the dissent.
- The decision overturns a 5th Circuit ruling invalidating Mississippi's law and rejects challenges led by former President Trump and the RNC.
On June 29, 2026, the U.S. Supreme Court ruled 5-4 in a landmark decision affirming state laws permitting the counting of mail-in ballots that arrive after Election Day, provided they were postmarked by Election Day and received within a specified grace period.
The case originated in Mississippi, where a law allows election officials to count mail-in ballots received up to five business days after Election Day under these conditions. This law reflects similar statutes in 14 states plus the District of Columbia, all of which the ruling now protects. The Supreme Court reversed a previous 5th Circuit Court decision that had found Mississippi's law conflicted with federal election law setting a single Election Day.
Justice Amy Coney Barrett authored the majority opinion, stating, "Election statutes dictate voting deadlines, not ballot receipt." She was joined by Chief Justice Roberts and Justices Sotomayor, Kagan, and Jackson. The dissent, by Justice Samuel Alito and joined by Justices Thomas, Gorsuch, and Kavanaugh, warned that the ruling "could erode public confidence in the electoral process."
The challenge against these laws was led by former President Donald Trump and the Republican National Committee, who argued such rules invite potential election fraud. However, election experts have noted that the ruling "spares states and election officials the burden of overhauling voting rules before the 2026 midterm elections," providing needed stability.
This decision is expected to influence mail-in voting procedures nationally in the upcoming November 2026 midterms, ensuring voters who meet mail deadlines are not disenfranchised due to postal delays. It also reinforces the authority of states to set their own rules on ballot receipt timing within federal frameworks.
By the numbers:
- 5-4 — Supreme Court's decision margin.
- 5 days — Grace period in Mississippi for counting late-arriving mail-in ballots.
- 14 states and D.C. — Jurisdictions with similar late-arrival mail-in ballot laws.
Yes, but: The ruling is narrowly decided and underscores ongoing partisan divides over election procedures, with dissenters warning it may reduce confidence in election integrity.
What's next: Election officials and counsel will prepare for the 2026 midterms under these clarified rules, and legislative responses from opposing states remain possible.