Supreme Court Shocker: Late Ballots Count

Blue USPS mail collection boxes in a row.

The Supreme Court just opened the door for more late-arriving mail ballots, raising fresh questions about election integrity and state power.

Story Snapshot

Supreme Court rules 5-4 that federal law does not block states from counting mail ballots that arrive after Election Day if they are postmarked on time.
Mississippi’s law, and similar laws in more than a dozen states, now stand — a major defeat for Republican National Committee lawyers who pushed for a strict Election Day cutoff.
Justice Amy Coney Barrett says the key is that voters must make their choice by Election Day, while Justice Samuel Alito warns the ruling creates “troubling” questions.
Hundreds of thousands of ballots arrived during grace periods in 2024, and many conservatives fear this decision will deepen doubts about close races.

What the Supreme Court Just Decided

The United States Supreme Court ruled 5–4 that federal Election Day laws do not stop Mississippi from counting absentee ballots that are postmarked by Election Day but arrive up to five business days later.^[5] Justice Amy Coney Barrett wrote the opinion, holding that Congress set the day by which voters must make their choice, not the day when all ballots must be in the hands of officials.^[5] Her reasoning treats Election Day as the deadline for voters to act, while leaving states room to manage mail delivery and counting.

Mississippi’s law requires that absentee ballots be postmarked on or before Election Day and received no more than five business days after.^[5] That rule grew out of the pandemic, and lawmakers later chose to keep it. The Republican National Committee argued that an 1845 federal statute demands that ballots be both cast and received by Election Day, but the Court rejected that reading.^[2] Barrett stressed that the “election” happens when voters mark and send their ballots by the deadline, and that counting can continue after.^[5]

How Many States Are Affected and How Big Is the Impact?

Mississippi is not alone. Roughly 30 states, the District of Columbia, and three United States territories now have some kind of grace period for mail ballots that are sent by Election Day and arrive later.^[2] Fourteen states plus Washington, D.C. have broad laws for regular voters, while others focus on military and overseas citizens.^[11] In 2024, at least 750,000 ballots were postmarked by Election Day and then arrived during these grace windows, so the ruling touches a significant number of votes in tight races.^[2]

Supporters say these grace periods protect voters from slow mail, bad weather, and other problems they cannot control.^[2] Some of these laws are not new; versions existed in the 1920s, 1930s, during World War II, and even before the Covid-19 pandemic.^[2] Critics, though, worry that stretching the timeline increases chances for confusion, legal fights, and claims of fraud, especially when late-counted ballots change margins after Election Night.

Why Many Conservatives Are Concerned

Before this case reached the Supreme Court, the United States Court of Appeals for the Fifth Circuit — one of the most conservative courts in the country — ruled that federal law requires ballots to be both cast and received by Election Day.^[3] That appeals court said Mississippi’s grace period conflicted with Congress’s choice of a single election day and was preempted.^[3] The Supreme Court has now reversed that view, siding with state flexibility over the stricter rule many on the right supported.

Justice Samuel Alito’s dissent warned that the majority’s holding creates “a slurry of troubling election-law questions” and could weaken confidence in election integrity.^[1] He and other conservative legal voices argue that when ballots are still arriving days after polls close, many citizens feel the election is not over and suspect back-room changes. Media outlets have already framed the decision as a “loss for the GOP” and another setback for efforts backed by President Trump to tighten mail voting rules.^[1]

State Power, Federal Limits, and the Path Ahead

This case fits into a long pattern of fights over who controls election rules. For more than twenty years, national party groups have challenged state mail-voting policies — including grace periods and drop boxes — by claiming federal Election Day law blocks any ballot received after that date.^[10] Lower courts usually rejected that claim, but the Fifth Circuit briefly accepted it before the Supreme Court stepped in. The new ruling confirms that, at least for now, states can keep setting their own mail ballot deadlines as long as voters must act by Election Day.^[5]

In the Supreme Court today:

Supreme Court rules mail-in ballots arriving after Election Day can be countedhttps://t.co/RVEgzUYZuj

— Frank Amari (@FrankAmari2) June 29, 2026

For conservatives, the stakes now shift. On one hand, the Court has affirmed state control over election procedures, a core constitutional value many on the right defend.^[1] On the other hand, critics fear that loose mail rules, rising use of absentee voting, and grace periods will keep feeding doubt about razor-thin results. Some Republican lawmakers are already pushing measures like the Save America Act, which would add voter identification and other limits that indirectly affect mail voting access.^[8] Those debates, not this single case, may decide how secure and trusted our elections feel in the years ahead.