19MAY

Court keeps late mail ballots counting

2 min read

18:17UTC

The Supreme Court upheld Mississippi's mail-ballot grace period 5-4 on 29 June, letting 14 states and DC keep counting ballots that arrive after election day.

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Key takeaway

Mail-ballot grace periods survive in 14 states and DC, with the fight now moving to state legislatures.

The Supreme Court upheld Mississippi's mail-ballot grace period on Monday 29 June, ruling 5-4 in Watson v. RNC that a state may count ballots postmarked by election day and received up to five business days later⁠¹. The Republican National Committee (RNC) had brought the challenge. We had flagged the ruling as due by the end of June. A mail-ballot grace period is simply the window after election day in which a ballot posted on time still counts.

Justice Amy Coney Barrett wrote the majority opinion, joined by Chief Justice John Roberts and the Court's three Democratic appointees. Barrett and Roberts crossed the Court's usual conservative-liberal line to form that majority, a coalition that did not hold a day later when the same nine justices freed party spending. The ruling keeps grace-period laws standing in 14 states and DC unless individual legislatures repeal them⁠².

Justice Samuel Alito dissented, arguing the federal election-day statute forecloses any counting of ballots after the polls close⁠³. Read narrowly, Barrett's vote may reflect caution about changing election rules close to a vote rather than a settled view on ballot mechanics. The split leaves the deadline question with state legislatures: a grace period survives only where a state has chosen to keep one.

Deep Analysis

In plain English

Mississippi, like 13 other states and Washington DC, lets election officials count a mailed ballot even if it arrives a few days after election day, as long as the post office stamped it by election day itself. The Republican National Committee argued that federal law sets one single deadline for everything, including counting, and that grace periods break that rule. the Supreme Court disagreed, 5-4. Ballots mailed on time can still be counted late. That matters most to roughly 4 million military and overseas voters, whose ballots often take longer to arrive through the postal system, and to anyone relying on their state's grace period this November.

Deep Analysis

Root Causes

Congress set a single national 'election day' in 1872 and never defined whether that deadline governs when a ballot is mailed or when it is counted, leaving each state to write its own answer. Fourteen states plus DC chose a grace period; Mississippi's version, at issue here, allows ballots postmarked by election day and received within five business days.

That 154-year-old gap is why the same federal statute has produced opposite outcomes in 2020 and 2026: courts are filling in a rule Congress left unwritten, using each case's specific facts rather than a settled national standard.

What could happen next?

Consequence
Grace-period laws in the 14 other states plus DC survive intact for November, removing a source of pre-election litigation risk for state election officials administering mail ballots.
Meaning
Roberts crossing over to join Barrett against Alito's dissent shows the mail-ballot question does not track the Court's usual ideological alignment.

Source Landscape

This story draws on neutral-leaning sources from United States

United States

Primary parallel: Republican National Committee v. Democratic National Committee (2020) reached the opposite result on a similar question, blocking a lower court from extending Wisconsin's ballot-receipt deadline past election day during the pandemic, on the ground that late-arriving ballots could not be counted absent a state law authorising it.

Counter-parallel: Watson does not overturn that 2020 case; it distinguishes it. Mississippi's five-day grace period is written into state law, not imposed by a court on the eve of an election, which is the precise defect the 2020 ruling identified.

Consensus view: UCLA election law scholar Rick Hasen argues the ruling turns on when a ballot counts as 'cast'. Amy Coney Barrett's majority read the federal Election Day statute to govern postmarking, not receipt, preserving state discretion to count ballots that were mailed on time.

Counter-view: Heritage Foundation election law fellow Hans von Spakovsky argues the same statute sets one national deadline for the whole voting process. A ballot arriving five days after election day has not been 'cast' by any ordinary reading of the word, regardless of its postmark.

Key tension: Whether the federal Election Day statute regulates the act of voting or only the act of mailing, a distinction the ruling settles for Mississippi but leaves open for grace-period laws written differently elsewhere.

Sources:CBS News·SCOTUSblog·Balls and Strikes

Mentions:Supreme Court of the United States →Watson v. RNC →Republican National Committee →Samuel Alito →Mississippi →Democratic National Committee →Heritage Foundation →Wisconsin →Washington →National Republican Senatorial Committee →

First Reported In

Update #11 · Money uncapped, ballot rules untouched

CBS News· 1 Jul 2026

Read original →

Causes and effects

Caused by

SCOTUS nears ruling on mail-ballot grace

SCOTUS issued the Watson v. RNC ruling that had been due by the end of June.

Occurred 19 May 2026

Read story →

This Event

Court keeps late mail ballots counting

The ruling leaves state legislatures, not the federal courts, as the venue for changing mail-ballot deadlines before November.

Different Perspectives

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