The Supreme Court spent more than two hours on Monday hearing arguments about whether states can count mail-in ballots that are postmarked by Election Day but arrive at election offices afterward. By the time the session ended, the outcome seemed all but certain: the conservative majority is ready to say no, and the consequences for the November midterms could be enormous.
The case, Watson v. Republican National Committee, began in Mississippi, where state law gives mail-in ballots a five-day grace period after Election Day to arrive and still be counted. The Republican National Committee and Mississippi’s state GOP sued to eliminate the practice, arguing it violates federal law establishing a single, uniform Election Day for all federal offices. Thirteen other states and the District of Columbia have similar grace period laws. A ruling striking them down, expected by summer, would force millions of voters to change how they cast their ballots just months before the midterms.
What The Justices Said, And What They Meant
The oral arguments offered a window into a court that appears to have already made up its mind. Justice Clarence Thomas led the questioning with a line of argument that treated grace periods as fundamentally incompatible with the concept of Election Day. Justice Amy Coney Barrett, widely watched as a potential swing vote, picked up Thomas’s thread and pushed it further, asking Mississippi’s attorney why the state should be allowed to extend voting past the day Congress has designated for it.
Justice Brett Kavanaugh went further still, raising the specter of public confidence. What happens, he asked, when late-arriving ballots determine the outcome of a close race? The implication was clear: grace periods breed distrust, and distrust is reason enough to eliminate them. It was a revealing moment, because the distrust Kavanaugh described is largely the product of a sustained political campaign by his own ideological allies to cast mail-in voting as inherently suspect.
The liberal justices pushed back, with Justice Sonia Sotomayor noting that the Postal Service’s own delivery standards make it unreliable to assume a ballot mailed on Election Day will arrive by Election Day. Justice Ketanji Brown Jackson questioned whether Congress, in establishing Election Day, intended to create a hard receipt deadline or simply a deadline for when voters must act. But these were dissenting positions. The math on this court is 6-3, and the questions from the majority left little doubt about which way the math will break.
The States In The Crosshairs
If the court rules as expected, the immediate impact will fall on 14 states and Washington, D.C. States like California, Illinois, Ohio, Virginia, and North Carolina all currently allow grace periods ranging from one to ten days. In 2024, California alone counted more than 1.3 million ballots that arrived after Election Day but were postmarked on time.
The practical effect is straightforward: voters who currently have the assurance that their ballot will count as long as they mail it by Election Day will lose that assurance. They will need to either mail their ballots earlier, with no guarantee the Postal Service will deliver them on time, or find an alternative way to vote. For voters in rural areas, voters with disabilities, voters who work multiple jobs, and military personnel stationed overseas, this is not a minor inconvenience. It is a barrier.
The Timing Problem
The court is expected to issue its ruling by the end of June or early July. The November midterm elections are roughly four months later. State election officials would have to overhaul their ballot processing procedures, update voter education materials, and reprogram counting systems in the middle of an election cycle. Some states may not have enough time to implement the changes cleanly, which could create exactly the kind of confusion and litigation that the court’s conservatives claim to want to avoid.
There is also the question of whether Congress would act to preserve grace periods through legislation. In theory, lawmakers could pass a law explicitly authorizing states to count late-arriving ballots. In practice, the current Congress has shown no appetite for expanding voter access, and any such bill would face a certain veto.
The Bigger Fight Over How Americans Vote
This case does not exist in a vacuum. It is the latest front in a years-long campaign to restrict the methods through which Americans cast their ballots. The expansion of mail-in voting during the COVID-19 pandemic made it easier for millions of people to participate in elections, and that expansion has been under assault ever since. Republican-led legislatures in more than a dozen states have passed laws tightening mail-in voting requirements, reducing ballot drop box locations, and imposing new ID requirements for absentee ballots.
The Supreme Court case takes that effort national. If grace periods are unconstitutional, the ruling will not just affect the 14 states that currently have them. It will send a signal to every state considering expanded voting access that the federal judiciary is prepared to intervene on the side of restriction.
The irony is not subtle. Mail-in voting was once a bipartisan convenience, embraced by military families, elderly voters, and rural communities. It became politically toxic only after it was used disproportionately by Democratic voters in 2020, at which point it was rebranded as a vector for fraud by politicians who had no evidence to support the claim.
Now the Supreme Court appears poised to codify that rebranding into constitutional law. The practical question for every voter in an affected state is simple: if this ruling comes down in July, do you know how you are going to vote in November? Because the rules you relied on last time may no longer apply.