The ruling represents a legal setback for President Donald Trump and Republican officials who have long pushed for stricter rules governing mail-in voting. Trump has repeatedly argued that voting by mail creates opportunities for fraud, although widespread evidence supporting those claims has not been established in court.
By declining to overturn Mississippi’s law, the Supreme Court also avoided forcing states to make last-minute adjustments to election procedures before future federal contests. Election administrators in several states can now continue operating under the same rules voters have become accustomed to in recent election cycles.
Mississippi is among 14 states that permit election officials to count absentee ballots arriving after Election Day, as long as they were postmarked on or before Election Day itself. Other states, including California, New York, and Texas, have adopted comparable deadlines that allow ballots delayed in transit to remain valid.
According to NBC News, hundreds of thousands of mail ballots cast during the 2024 election were ultimately included in official vote totals after arriving in the days following Election Day under those existing state laws. While those ballots represented only a relatively small percentage of the total vote, they nonetheless played an important role in ensuring eligible voters were counted.
Supporters of Mississippi’s law also argued that changing the rules could have created unintended consequences for Americans voting from overseas. Military service members and other citizens living abroad often face longer mail delivery times, making post-Election Day receipt deadlines particularly important.
Court filings submitted by former national security officials pointed out that 29 states currently provide extended ballot receipt deadlines for military personnel and overseas voters. Those policies are designed to ensure that Americans serving their country or residing overseas are not disenfranchised because of international mail delays beyond their control.
Under Mississippi law, election officials may count absentee ballots that arrive within five days after Election Day, provided those ballots were mailed on or before the legal deadline. That system has remained in place for years and was at the center of the legal dispute before the Supreme Court.
The lawsuit challenging the law was brought by the Republican National Committee, the Mississippi Republican Party, and the Libertarian Party of Mississippi. Interestingly, Mississippi Attorney General Lynn Fitch, a Republican, defended the state’s statute throughout the litigation, arguing that it complied with federal law.
The case reached the Supreme Court after the New Orleans-based 5th U.S. Circuit Court of Appeals ruled in October 2024 that federal election law requires ballots to be both cast and received by Election Day. That appellate decision threatened to invalidate similar ballot receipt deadlines in numerous states, setting the stage for Supreme Court review.
At the center of the dispute was the interpretation of federal election law, which establishes Election Day as “the Tuesday next after the first Monday in November.” While Congress sets the date for federal elections, states have traditionally maintained broad authority over how elections are administered, including many of the procedures governing absentee and mail-in voting.
With Monday’s ruling, the Supreme Court reaffirmed that states retain flexibility in administering those election procedures under existing federal law. The decision ensures that current ballot receipt deadlines in states with similar policies will remain in effect unless Congress chooses to change the governing statute in the future.
