Supreme Court Upholds Late-Arriving Mail-In Ballots Postmarked by Election Day

The United States Supreme Court has issued a decisive ruling allowing states to accept mail-in ballots that arrive after Election Day as long as they are postmarked on or before the election date. This 5-4 decision, delivered Monday, reverses a previous Fifth Circuit court ruling and upholds state laws in approximately 30 states and Washington D.C., which permit late-arriving ballots under these conditions.

The case, Watson v. Republican National Committee, was brought by the RNC and Mississippi Republicans challenging a Mississippi law that allows absentee ballots to be counted if received within five business days after Election Day. The plaintiffs argued that federal statutes setting a uniform election day mandate that all ballots must be received on or before this date for validity.

Writing for the majority, Justice Amy Coney Barrett emphasized that federal laws regulate when voters cast their ballots, not when they are received by election officials. She noted that an "election" is defined as the act of voting itself, which concludes at the end of Election Day. Therefore, state legislatures retain the authority to establish rules governing ballot receipt deadlines.

Chief Justice John Roberts and Justices Breyer, Sotomayor, and Kagan joined Barrett's opinion. In dissent, Justice Samuel Alito warned that accepting late ballots could undermine public confidence in election integrity and potentially facilitate voter fraud. He was supported by Justices Thomas, Gorsuch, and Kavanaugh, who partially concurred with his concerns.

This ruling has significant implications for future elections, particularly as more states adopt or consider expanding mail-in voting options amid ongoing debates about electoral security and accessibility.