The US Supreme Court on Monday night rejected a bid by the Trump administration to keep onerous US Postal Service rules for mail-in ballots in place, which voting-rights defenders said risked depriving millions of people of the franchise in this year’s midterm elections.

After a back-and-forth legal battle over the USPS rules that dragged on for months, the nation’s highest court issued the 7-2 ruling without elaborating on its legal reasoning, though right-wing Justices Samuel Alito and Clarence Thomas issued dissents in favor of President Donald Trump’s side.

The ruling in USPS v. California was in response to a legal challenge brought by the League of Women’s Voters, the attorneys general of numerous states, and others who argued that newly-announced rules by the Postal Service regarding mail-in ballots, changes prompted by an executive order issued by Trump, would prevent people from having their ballots counted and cause chaos for those trying to administer this year’s elections.

A victory for democracy, a defeat for election deniers. https://t.co/MKjfKmgyTv

— David Crowley (@DavidCCrowley) September 15, 2026

In response to the ruling, the plaintiffs’ legal team said the decision was “a critical step to ensuring free and fair elections this November by maintaining access to mail voting for millions of eligible voters across the United States and lifting the dire threat that the Postal Service would disenfranchise them.”

“Mail voting is safe, secure, and reliable—and the Trump administration has presented no evidence to the contrary, as the courts have repeatedly recognized,” the statement continued. “We will remain vigilant in countering threats to free and fair elections and ensuring that every eligible voter is able to cast a ballot and have it count.”

“Today’s decision is a victory for our democracy and a powerful affirmation of the rule of law,” said California Attorney General Rob Bonta in a statement. “The stakes in this litigation could not have been higher.”

Virginia Kase Solomón, president and CEO of Common Cause, was among the other pro-democracy advocates who welcomed the decision.

“Today’s decision is a major win for the millions of everyday Americans who count on vote-by-mail—our seniors, service members, busy parents, rural voters, and voters with disabilities,” said Solomón in a statement. “Vote-by-mail is safe, proven, and vital; even the president uses it. This executive order was a blatant power grab designed to silence voters and undermine our elections, but it failed because the people and the law were on our side. Our Constitution is clear: states run our elections, and voters choose their leaders—not the other way around. No administration can strip the people of their power.”

Michael McNulty, senior policy director for Issue One, a nonpartisan group that works to defend free and fair elections, also welcomed the ruling, but said vigilance would still be necessary going forward.

“The fight to preserve states’ authority to administer elections is far from over,” warned McNulty.

“President Trump continuously and falsely claims fraud in mail-in voting without evidence,” he added. “Despite voting multiple times with this method, he remains obsessed with centralizing control over elections to tilt the playing field. However, for now, one piece of that centralization effort is blocked, and it ensures that mail-in voting for the midterms won’t be disrupted.”