Supreme Court Just Put 31 States’ Mail-In Ballot Rules On The Chopping Block

The 2020 election battles never really ended.

Republicans knew Democrats would keep fighting dirty.

And the Supreme Court just put 31 states’ mail-in ballot rules on the chopping block.

The Supreme Court announced Monday it's taking up a case that could blow up election rules in 31 states plus Washington, D.C.

At stake is whether mail-in ballots can be counted if they arrive after Election Day.

The Republican National Committee sued Mississippi over its law allowing ballots to be counted up to five business days after Election Day as long as they're postmarked by the deadline.

A federal appeals court sided with the RNC in 2024, ruling that federal law requires all ballots to be received by Election Day, not just cast by then.

Now the Supreme Court will settle this mess once and for all.

Democrats Built Their Machine on Late-Arriving Ballots

Here's what Democrats don't want you to know.

The fight over mail-in ballot deadlines has been raging since 2020 when COVID gave Democrats the perfect excuse to rewrite election rules.

Back then, multiple states extended their ballot receipt deadlines, claiming postal delays justified keeping the polls essentially open for days or weeks after Election Day.

Pennsylvania allowed ballots three days after the election.

North Carolina stretched it to nine days.

The Supreme Court got dragged into those battles right before the 2020 election, with justices splitting on whether to allow the extensions.

Justice Brett Kavanaugh warned back then that states want "to avoid the chaos and suspicions of impropriety that can ensue if thousands of absentee ballots flow in after Election Day and potentially flip the results of an election."¹

That's exactly what happened in multiple close races.

Mississippi made its five-day grace period permanent after 2020.

The RNC finally said enough is enough and sued in 2024.

A federal judge in Mississippi initially upheld the state law, but the Fifth Circuit Court of Appeals reversed that decision.

The appeals court ruled federal election law setting the Tuesday after the first Monday in November as "election day" means ballots must be both cast by voters AND received by state officials by that day.²

The RNC Has Been Playing Hardball on Election Integrity

This Mississippi case isn't the RNC operating in isolation.

The Republican National Committee has filed over 100 election-related lawsuits since 2022 as part of what former RNC Chairwoman Ronna McDaniel called the "most litigious" approach to elections in party history.

The RNC committed $30 million to election integrity efforts in 2022 alone, including recruiting poll workers and launching dozens of lawsuits challenging everything from voter roll maintenance to mail-in ballot procedures.³

After a 1981 consent decree that hampered Republican election monitoring expired in 2018, the RNC went on offense.

They've challenged mail-in voting expansions in Michigan, Pennsylvania, Wisconsin, and multiple other battleground states.

Democrats and their allies at the ACLU claim the lawsuits are designed to "create the appearance that state and local election officials are not playing by the rules."⁴

Translation: Republicans are actually enforcing election laws and Democrats hate it.

The RNC argues states allowing post-Election Day ballot receipt "deprive the electorate of a clear nationwide deadline" for elections.⁵

When ballots can trickle in for days or weeks after everyone else voted, it destroys confidence in the results.

Trump's Executive Order Set the Stage for This Fight

President Trump didn't wait for the courts to act.

In March 2025, Trump signed an executive order directing the Attorney General to enforce federal election day statutes against states that count ballots received after Election Day.

The order specifically cited the Fifth Circuit's Mississippi ruling as justification for requiring all ballots to be "cast and received" by Election Day.⁶

Federal courts have blocked parts of Trump's order, but the Supreme Court taking this case puts the issue front and center for next year's midterm elections.

Mississippi Secretary of State Michael Watson and Attorney General Lynn Fitch argue that an "election" is the "conclusive choice of an officer" which occurs when voters cast their ballots by the deadline, even if officials don't receive all ballots until days later.⁷

These are Mississippi officials, ironically led by Republicans, defending their state's law against the RNC's challenge – which is simply the nature of those positions as the state’s top legal officials which have a duty to defend the state when it is a party to litigation.

A group of 19 Democrat-controlled states filed a brief supporting Mississippi, warning that the Fifth Circuit's ruling "jeopardizes the ability of states to count lawfully cast ballots from military service members and their families who are stationed abroad."⁸

That's rich coming from the same Democrats who fought tooth and nail against counting military ballots in Florida during the 2000 recount.

What This Means for Future Elections

The stakes couldn't be higher heading into the 2026 midterms.

Fifteen states allow regular mail ballots to be received after Election Day, including the swing state of Nevada.

Another 14 states allow late-arriving ballots from military voters and overseas citizens.⁹

If the Supreme Court sides with the RNC, all those state laws could be wiped out.

States would have to require all ballots to be received by Election Day, not just postmarked by then.

That would fundamentally change how millions of Americans vote.

Democrats built their entire get-out-the-vote operation around maximizing mail-in voting and ballot harvesting.

They spent 2020 suing states to extend deadlines and eliminate signature verification requirements.

When Trump questioned the integrity of mail-in voting, Big Tech censored him and the media called him a conspiracy theorist.

Now the Supreme Court is being forced to answer the basic question: does Election Day actually mean anything, or can states keep the polls open as long as they want?

The Court will hear arguments next year with a decision expected by June or July 2026 – just months before the midterm elections.

Republicans have been playing catch-up on mail-in voting since 2020.

The RNC finally built the legal infrastructure to fight Democrats' election rule changes in court instead of just complaining about them on Twitter.

This Supreme Court case represents years of work laying the groundwork to restore sanity to American elections.

If the Court sides with the RNC, Election Day will actually mean something again.

Democrats won't be able to keep finding boxes of ballots for days after everyone else finished voting.

And Americans might finally have confidence that when they go to bed on election night, the results they see will be the results that count.

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¹ Amy Howe, "Justices agree to decide major election law case," SCOTUSblog, November 10, 2025.

² Ibid.

³ "Republican National Committee makes $30 million investment in 'election integrity' initiatives, including dozens of lawsuits," OpenSecrets News, November 1, 2022.

⁴ Ibid.

⁵ "Supreme Court will hear case on post-Election Day ballot counting," Roll Call, November 10, 2025.

⁶ "Supreme Court will decide whether states can count late-arriving mail ballots, a Trump target," Greeley Tribune, November 10, 2025.

⁷ "Justices agree to decide major election law case," SCOTUSblog, November 10, 2025.

⁸ Ibid.

⁹ "Supreme Court agrees to decide if mail-in ballots can arrive after Election Day," CNN Politics, November 10, 2025.