Trump wins Supreme Court ruling on mail-in voting limits

The conservative majority lifts a lower-court order blocking the president’s restrictions ahead of the November 2026 midterm elections, while leaving open a future legal challenge

President Donald Trump has secured an initial victory at the Supreme Court in his effort to restrict mail-in voting ahead of the November 2026 midterm elections. The court’s conservative majority, over the dissent of its three liberal justices, lifted a federal judge’s order that had blocked implementation of Trump’s executive order restricting the U.S. Postal Service from sending mail-in ballots to voters who do not appear on federally compiled lists of American citizens.

The ruling overturns a decision issued last June by a federal judge in Massachusetts, who had sided with Democratic-led states challenging the president’s order. The Supreme Court majority did not rule on whether Trump’s executive order itself is lawful. Instead, the justices held that the federal judge had acted without sufficient authority to block the policy before the Postal Service had actually implemented the new rules.

The federal lists of citizens created by the administration have raised concerns because election administration has traditionally been controlled by individual states. Trump has justified the measure by repeatedly alleging, without supporting evidence, that large numbers of noncitizens voted in recent elections and that their votes contributed to his defeat in 2020.

The conservative justices emphasized that states would still be able to challenge the Postal Service’s final measures if those rules cause them harm. The decision therefore leaves the central legal question unresolved: whether the administration can lawfully impose the restrictions contained in Trump’s executive order.

Justice Ketanji Brown Jackson sharply criticized the ruling, describing it as a “Kafkaesque nightmare” that could inject “unnecessary chaos” into the electoral process. Justices Sonia Sotomayor and Elena Kagan also stressed that the court had not determined whether Trump’s attempts to interfere with the states’ administration of the November 2026 elections are legal.

The White House welcomed the decision, praising what it called the “common-sense measures” contained in Trump’s executive order. “This administration will continue to lawfully implement President Trump’s election agenda, which includes securing our elections,” White House spokeswoman Lauren Bis said.

Democratic-led states immediately vowed to continue their legal challenge to Trump’s effort to restrict mail-in voting, a method that has traditionally benefited Democrats. New York Attorney General Letitia James called the ruling “a painful defeat,” but added that it “will not be the last word.”

California is also preparing another legal challenge. Democratic Gov. Gavin Newsom said on X that the state would again sue to block what he described as Trump’s attack on mail-in voting, insisting that California voters would continue to receive their ballots by mail.

The Supreme Court’s conservative majority nevertheless made clear that its decision was narrowly focused. The justices said the lower court’s injunction had been premature because it was issued before the federal government had actually put Trump’s order into effect. At the same time, they acknowledged that the measures eventually adopted to implement the order could still face legal scrutiny.

That leaves open the possibility of another court battle over the regulations ultimately adopted by the Postal Service. Richard Hasen, a UCLA law professor and head of the Safeguarding Democracy Project, told The Washington Post that the issue is likely to return to the Supreme Court after what he described as a “narrow and technical” ruling.

A renewed Supreme Court case could come much closer to the midterm elections, potentially increasing uncertainty over how mail-in voting will be administered in November 2026.

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