Supreme Court Rebuffs Trump Administration Attempt to Restrict Mail-In Ballots Through Postal Service

In a major legal defeat for President Donald Trump, the U.S. Supreme Court on Monday refused to allow the U.S. Postal Service to enforce a contentious set of restrictions on mail-in ballots ahead of the high-stakes November midterm elections.

The justices rejected an emergency application submitted by the Justice Department that sought to lift a preliminary injunction previously issued by a federal district judge in Boston. That lower-court order had stopped the Postal Service from executing the restrictive rules while broader lawsuits filed by states and voting-rights organizations continue to move forward.

In an unsigned, single-paragraph order, the Supreme Court justified its decision by stating that the federal government was unlikely to succeed on the merits of its legal challenge against the district court's preliminary injunction.

Conservative Justice Samuel Alito dissented from the decision and was joined by fellow conservative Justice Clarence Thomas. No other member of the court, which maintains a 6-3 conservative majority, registered a public dissent against the ruling.

The disputed Postal Service policy was established following an executive order signed by Trump in March, which sought to impose stricter federal conditions on the use and administration of mail-in voting across the country.

Under the new postal rules, state election authorities were required to submit comprehensive rosters of mail-in ballot recipients directly to the Postal Service. The regulations also mandated that states use agency-approved outbound and return ballot envelopes embedded with distinctive barcode identifiers.

The policy granted the Postal Service broad power to refuse the distribution and return of ballots that failed to satisfy the mandatory design specifications or were directed to voters who did not appear on the official state-submitted recipient lists.

Voting-rights advocates and state officials strongly opposed the rules, warning that the policy threatened to delay or block the delivery of thousands of legitimate ballots as the November 3 general election draws near. Opponents stressed that implementing the system on short notice would cause severe disruption at a moment when multiple states are already preparing to send ballots to voters.

Boston-based U.S. District Judge Indira Talwani had blocked the measure on September 4, ruling that the policy likely violated the U.S. Constitution, which delegates the administration of elections to individual states. Judge Talwani also concluded that it would be virtually impossible for state election officials to comply with the federal requirements in time for the upcoming midterms.

The administration encountered further legal resistance over the weekend when Washington, D.C.-based U.S. District Judge Carl Nichols also issued a ruling against the postal restrictions.

The legal fight carries significant political weight as Republicans seek to defend their majority in Congress during the midterm contests. Survey data indicates that Democratic voters disproportionately rely on mail-in voting, meaning that limitations placed on the postal system could provide an electoral benefit to Republican candidates.

While the administration has maintained that the stricter mail guidelines are necessary to curb voter fraud, documented occurrences of widespread election fraud in the United States are exceptionally rare.

Civil rights groups celebrated the high court's decision on Monday. Sophia Lin Lakin, the director of the American Civil Liberties Union's voting rights project, which assisted in representing several challengers, said the administration has continually tested the boundaries of executive authority. She reiterated that the Constitution explicitly assigns the power to regulate federal elections to Congress and the states, rather than the president or the Postal Service.

California Governor Gavin Newsom, whose state served as a lead plaintiff in litigation brought by a coalition of Democratic state attorneys general, praised the ruling as a victory for democratic norms and the constitutional right to vote. Newsom added that Trump’s repeated efforts targeting election procedures over the preceding 20 months were un-American.

Trump's push to curb mail voting comes after years of questioning the integrity of the process, despite the fact that the president regularly uses mail ballots to cast his own votes. Trump has repeatedly made unfounded claims alleging pervasive fraud in American elections, including in his 2020 defeat to former Democratic President Joe Biden.

Monday's ruling resolves the emergency request filed by the Justice Department on September 6, ensuring that state-level election plans and mail-in voting procedures will proceed without the Postal Service's proposed restrictions in place for the November 3 vote.