The Supreme Court on Monday heard oral arguments over a Mississippi statute that allows mail-in ballots postmarked by Election Day but received up to five business days later to still be counted.
As the justices questioned each side, they appeared likely to strike it down, a ruling that would ripple across more than a dozen states with similar grace periods and force election officials to overhaul their procedures months before the 2026 midterms.
The case is straightforward in principle. Federal law designates a single Election Day: the Tuesday after the first Monday in November.
The Hill reported that the Republican National Committee argues that ballots must be received by that day, not merely dropped in a mailbox. Solicitor General D. John Sauer told the court that the Trump administration agrees.
A lower court already ruled that federal law preempts Mississippi's statute. Now the state has appealed, and the nation's highest court will decide whether "Election Day" means what it says.
Chief Justice John Roberts cut to the core of the RNC's position during oral arguments:
"If Election Day is the voting and taking, that has to be that day."
Justice Samuel Alito offered his own assessment of how far election procedures have drifted from the statutory framework. "We don't have Election Day anymore," he said. "We have election month."
The sharpest exchange came when Justice Elena Kagan pressed the RNC's lawyer, Paul Clement, on why the challenge targets late-arriving ballots but not early voting. After all, she noted, early voters aren't casting ballots on "that first Tuesday" either.
Clement called the two situations "different," arguing that votes need to be "consummated" by Election Day. Roberts was unconvinced by the distinction:
"So maybe I just missed it, but it seems to me maybe you're not saying anything other than, 'Well, that's different.'"
That exchange matters. If the Court rules broadly that Election Day means Election Day, the logic doesn't stop at grace periods. It raises questions about the entire patchwork of early voting timelines, mail-in deadlines, and ballot-receipt windows that states have stitched together over the past two decades. Alito acknowledged that some "line-drawing decisions" may be inevitable.
Some 14 states plus the District of Columbia currently have grace periods for regular mail-in ballots similar to Mississippi's. Another 29 states accept military and overseas ballots after Election Day. A ruling against Mississippi's statute would force all of them to reconsider their timelines.
Oregon offers a useful case study. The state's seven-day grace period, put into effect in 2022, led to nearly 32,000 ballots being counted after Election Day that year.
By 2024, that number dropped to closer to 13,000, though officials anticipate it will climb again in 2026. A top aide to Oregon Secretary of State Tobias Read said voters who live 50 miles or more from Portland would be most impacted.
Massachusetts has a three-day grace period for postmarked domestic ballots. Debra O'Malley, spokesperson for the Massachusetts Secretary of State's office, acknowledged the challenge ahead:
"Unfortunately, it is difficult to plan for a change that will occur just months before an election, especially when we can't know exactly what the court's decision will say."
O'Malley also expressed concern that eligible voters would be disenfranchised if the grace period is eliminated, particularly overseas voters. She said the state can't send ballots sooner due to primary timing and expects to focus on public education and alternative return methods.
Even before the Court issues its opinion, state officials are moving:
Clement told the Court that states would have "plenty of time" to adjust, noting a ruling would affect only the general election in November, not primary races. A decision could come as late as June.
The voting rights establishment is treating this case as a crisis. Andrew Garber, counsel in the Brennan Center for Justice's Voting Rights and Elections Program, invoked his organization's favorite framework:
"When it comes to voter suppression, so often, it's death by 1,000 cuts."
Rebekah Caruthers, president and CEO of the Fair Elections Center, warned that the ruling could affect people with disabilities and said it "puts an unfair burden on states."
But step back from the activist language and consider what's actually being asked. The RNC is arguing that federal law means what it says: there is an Election Day, and ballots should arrive by it.
That's not suppression. That's a deadline. Every other consequential act in civic life has one. Tax returns. Court filings. Candidate petitions. Nobody calls it "suppression" when the IRS won't accept a return postmarked April 15 but delivered April 22.
The deeper issue is that states built sprawling mail-in voting regimes, many of them during the COVID-19 pandemic, and then made them permanent without ever reconciling them with the plain text of federal law.
Mississippi's statute was enacted during the pandemic and later made permanent. The question isn't whether that was convenient. The question is whether it was lawful.
More than 88 million voters cast ballots early by mail or in person in the 2024 presidential election. In 2022, more than 47 million did the same. The data show that early voting is bipartisan: 41 percent of registered Democrats and 38 percent of registered Republicans voted early in 2024. This isn't a partisan practice. But the rules governing it should still conform to the law Congress actually passed.
Garber raised what he framed as a slippery-slope concern:
"I don't think that anyone has really thought through, from a legal perspective — from a 'something-you-can-ground-in-an-existing-law' perspective: Where would this logic of 'day for the election' being super literal start, and where would it stop?"
It's an interesting question, but it cuts the opposite direction from how he intended it. If the legal framework for when and how Americans vote has become so muddled that even election law experts can't identify its boundaries, that's an argument for clarity, not for leaving the muddle in place. Courts exist precisely to draw the lines that legislatures blur.
States that built their systems around grace periods have months to adapt. Oregon is already doing it. Illinois is already doing it. The infrastructure exists for voters to return ballots in person, use drop boxes, or simply mail earlier. These aren't insurmountable obstacles. They're logistics.
The Court has a chance to restore a simple principle: Election Day is a day, not a suggestion. If that ruling arrives by June, every state in the country will know exactly where the line is. That's not suppression. That's the law working as designed.
