Supreme Court examines important mail-in ballot issue ahead of Election Day

Supreme Court May Overturn Mail-In Ballot Laws

The conservative majority of the Supreme Court seems ready to challenge state laws allowing mail-in ballots to be counted even after Election Day. This lawsuit, which could impact voting regulations for millions, comes just months before the 2026 midterm elections.

At the center of the debate is a Mississippi law permitting the counting of mail-in ballots received up to five days post-election, provided they are postmarked by Election Day. President Trump has made mail-in voting a focal point during his second term, claiming it undermines trust in elections. It appears that similar laws may soon be adopted in at least 13 states and D.C., emphasizing the wide-reaching implications of this case.

During nearly two hours of oral arguments, the justices leaned toward the views expressed by U.S. Attorney General D. John Sauer, a lawyer from the Trump administration. He argued that Mississippi’s law, and others like it, could erode voters’ confidence in election results.

Justice Samuel Alito raised the potential consequences of delays in results, suggesting they could significantly shake public trust. Justice Brett Kavanaugh echoed this sentiment, noting that late ballots could even lead to allegations of election fraud if a presumed winner were to lose due to late-arriving mail-in votes.

This legal battle is separate from an earlier executive order signed by Trump aimed at eliminating mail-in voting in federal elections, which some Republican-led states have since acted upon. The current case involves a Republican National Committee lawsuit aimed at Mississippi’s mail-in voting laws implemented during the COVID-19 pandemic.

Mississippi representatives defended their law against various hypothetical concerns raised by the conservative justices, such as the implications for early voting and ballots from U.S. service members abroad. Justice Neil Gorsuch, for instance, pressured lawyers for clarification on how far states might extend deadlines if the court sides with Mississippi.

Paul Clement, advocating for some Republican and Libertarian voters, warned that a ruling in favor of Mississippi could open a floodgate of possibilities, potentially allowing states to impose arbitrary deadlines. “Maybe the next state will find a way to hold an election without anyone receiving anything,” he said. “That’s why Election Day should mean ‘Election Day.’”

This case reflects a broader, ongoing legal struggle concerning how much authority states should have over voting processes, including those involving both federal and local candidates. As the justices also review other significant election-related cases this year—such as the impact of race on congressional district boundaries and federal restrictions on political party spending—the stakes remain high.

Mississippi’s defense highlighted that, according to their interpretation, the election happens on Election Day, regardless of when all ballots are collected, pointing out that “voters must cast their votes by Election Day.”