A Federal Judge Has Now Blocked Trump's Mail-Ballot Rule Twice. The Supreme Court Already Overruled Her Once.

With the midterm elections closing in, a fight over who controls the mechanics of mail-in voting is bouncing between a federal courtroom in Boston and the Supreme Court for the second time in a month — and this time, ballots are already going out the door while the two sides argue.

The U.S. Postal Service rule at the center of the fight sets new ballot envelope design specifications and requires states to submit voter data into a USPS portal. The Trump administration describes these as modest technical specifications, not a substantive change to voting policy — administration officials have compared the USPS's authority here to existing postal rules governing the mailing of cremated remains or replica explosives. The stated purpose, according to the administration, is addressing the risk that the mail system could be used to facilitate voter fraud.

This isn't the first time this specific fight has reached the justices. In late August, the Supreme Court voted 6–3 along ideological lines to lift an earlier injunction against the broader executive order this rule stems from, finding that the district court's block had been premature because the rule hadn't been finalized yet. That ruling cleared the way for the Department of Homeland Security to compile a federal citizenship list to share with states, for the Attorney General to prioritize prosecuting state officials who issue ballots to allegedly ineligible voters, and for the USPS to proceed with its own rulemaking.

Once the USPS rule was actually finalized, U.S. District Judge Indira Talwani blocked it again — first with a 14-day temporary restraining order on August 27, then, on September 4, with a preliminary injunction that replaces and extends that block. Talwani's reasoning was pointed: she wrote that election officials are "unable to pivot this late in the election cycle," that implementation now would risk "significant disenfranchisement for eligible voters," and that "the Constitution does not grant the President any specific powers over elections." She also noted that the administration had presented no evidence of the fraudulent mail voting the rule is meant to prevent.

A coalition of 23 states, led by California, plus Washington, D.C., sued to stop the rule, arguing it conflicts with the Constitution's Elections Clause, which gives states — not the federal government — authority over the times, places, and manner of elections. That argument is at the core of Talwani's injunction.

On September 3, the Trump administration filed an emergency application asking the Supreme Court to freeze Talwani's order a second time, arguing the delay itself causes "serious irreparable harm." That's not an abstract legal argument: North Carolina and Alabama were scheduled to begin mailing ballots as early as September 4 and 5 — meaning the rule's fate is being litigated in real time, state by state, as ballots are actually printed and mailed. The Supreme Court has given the 23-state coalition until September 8 to respond to the administration's request.

Nothing about the underlying constitutional question has been resolved. The August ruling addressed whether the earlier block was premature, not whether the finished rule is lawful. Talwani's new injunction addresses the merits of the finished rule directly, and it currently stands. Whether the Supreme Court intervenes again before more states send out their ballots is the next thing to watch.