Supreme Court Blocks Trump Mail-In Ballot Restrictions Ahead of Midterms

Supreme Court Order and Legal Background

The measure at the center of the dispute was adopted after President Trump issued a March executive order aimed at tightening regulations governing mail voting. Under the contested rule, states would have been required to provide lists of mail ballot recipients to the Postal Service and utilize agency-approved outbound and return ballot mail envelopes outfitted with unique barcodes. The Postal Service would then have been authorized to refuse outbound delivery for ballots that did not comply with the new standards or were associated with voters not appearing on the provided lists.

Judge Talwani blocked the measure on September 4, ruling that it likely violated the U.S. Constitution by encroaching upon the authority of states to administer elections, and noting that compliance would be impossible for states given the rapidly approaching November 3 vote. Another federal judge, Washington, D.C.-based U.S. District Judge Carl Nichols, also ruled against the rule on Sunday.

The administration countered with a September 6 emergency request urging the Supreme Court to allow implementation of what it described as an important federal policy to protect the mail from being used to commit voter fraud. The Supreme Court rejected that emergency request on Monday.

“The government is unlikely to succeed on the merits of its challenge to the District Court’s preliminary injunction,” the high court stated in its order.

Justice Samuel Alito, joined by fellow conservative Justice Clarence Thomas, dissented from the decision. No other justices dissented publicly.

Conservative Justice Brett Kavanaugh wrote in a concurring statement that while there is a “fair prospect” the rule falls within the Postal Service’s authority, state and local election officials “do not have sufficient time to reasonably implement the rule” prior to the 2026 elections.

Political Stakes and Reactions

The decision directly impacts the electoral landscape as Republicans fight to maintain control of Congress in the upcoming midterms. Voting surveys indicate that Democratic voters disproportionately utilize mail-in ballots, meaning restrictions on postal voting stand to benefit Republican candidates.

Critics of the Postal Service measure argued that it threatened to disrupt the delivery of thousands of legitimate ballots and generate operational chaos as states prepared to distribute mail ballots to eligible voters. While the administration maintained the rule was necessary to prevent voter fraud, evidence of widespread mail ballot fraud remains rare.

Sophia Lin Lakin, voting rights project director at the American Civil Liberties Union—which helped represent challengers to the USPS rule—welcomed the Supreme Court’s action.

“This administration keeps testing the limits of its power, as if the rules governing our elections are merely suggestions to ignore when they don’t suit the president’s agenda,” Ms. Lakin said. “But the Constitution gives states and Congress the power to set the rules for federal elections – not the president, and not the Postal Service.”

California Governor Gavin Newsom, whose state led one of the lawsuits challenging the directive, also praised the outcome.

“Today is a good day for democracy, the rule of law and the American people looking to exercise their constitutional right to vote,” Governor Newsom said.

President Trump has consistently cast doubt on the security of postal voting—despite frequently voting by mail himself—and has repeated false claims of widespread fraud in U.S. elections, including his 2020 loss to former Democratic President Joe Biden.

Legal challenges by states and voting-rights groups will continue to proceed in lower courts as election administrators finalize preparations for the November 3 midterm balloting.