WASHINGTON — The Supreme Court on Monday cleared the Trump administration to begin carrying out key portions of a March executive order restricting mail-in voting, lifting a lower-court injunction in a 6-3 ruling that frees federal agencies to act in 23 Democratic-led states 10 weeks before the Nov. 3 midterm elections.

The unsigned decision is a procedural, not merits, victory for the White House. It clears the Department of Homeland Security to compile "state citizenship lists" from federal databases and lets the U.S. Postal Service implement a Friday rule that feeds those lists into ballot-tracking rosters sent to state election chiefs on Election Day.

What the majority said

The six conservative justices did not endorse the executive order itself. "The Court's disposition of this application does not mean that any measure taken by the Government to implement the Order will necessarily be lawful," the court wrote. "On that score, time will tell. But the Order itself does not harm the States, so the District Court lacked jurisdiction to bar the Government from trying to implement it."

The injunction was issued in June by U.S. District Judge Indira Talwani in Massachusetts, who held that only the states may set voter-eligibility rules and that the directive's provisions governing DHS and the Postal Service are unconstitutional. A 2-1 panel of the 1st U.S. Circuit Court of Appeals declined late last month to stay her order. The court also granted a parallel application from Alabama and 11 other Republican-led states.

What agencies can do

Under the Postal Service's Friday rule, state election officials must submit voter names and addresses to an online portal; the agency will then generate "Mail-In and Absentee Participation Lists" for state chief election officials on Election Day.

Those lists are "primarily intended to assist election officials and law enforcement to understand who may have been mailed a ballot, in order to identify potentially anomalous incidents that may merit further investigation," the Postal Service said, adding that it "will not play any role in determining voter eligibility, maintaining voter rolls, or counting ballots." The administration told the justices the Postal Service "will not refuse to transmit ballots" from senders who do not appear on a state registry.

The directive also sets design requirements for federal mail ballot envelopes and directs the attorney general to prioritize prosecutions of state and local officials who issue ballots to noncitizens.

The administration's case

The White House called the ruling "a major win for the security of American elections."

"These are commonsense measures that protect the security of mail-in ballots and ensure only Americans are electing American leaders," White House spokeswoman Lauren Bis said in a statement. "This Administration will continue to lawfully enact the agenda President Trump was elected on — which includes the safety and security of our elections."

Solicitor General D. John Sauer, who did not defend the merits of the order in his emergency filing, argued the 23 states could not be harmed by "hypothetical future actions" because agencies were still working out how to carry the directive out. The order, he wrote, "functions as an internal directive from the President to subordinate officials and agencies to engage in future policymaking." Every day the injunction stood, Sauer told the court, "it blocks the government's ability to finalize and implement the President's proposed policies to promote election integrity for the upcoming federal elections in November."

The dissent

The three liberal justices dissented. Justice Sonia Sotomayor, joined by Justice Elena Kagan, wrote that the decision "merely postpones adjudication" of the underlying legal challenges. "Today's decision does not address whether the President's attempts to interfere with States' administration of the November 2026 elections are lawful," Sotomayor wrote. "Nor does it suggest that the Executive Branch has any constitutional or statutory authority to implement the President's directives."

Justice Ketanji Brown Jackson dissented separately, accusing the majority of "taking its eye off the ball" by resolving the case on procedural grounds rather than confronting what she cast as an administration effort "to secure our imprimatur for its effort to foment chaos ahead of the November elections."

New York Attorney General Letitia James, who joined the states' challenge, called the ruling "a painful setback, but it will not be the final word." California Gov. Gavin Newsom said his state "WILL SUE again to BLOCK Trump's attack on mail-in voting!" in a post on X.

The counterpoint

Monday's dossier held only lean-left wire coverage; no center or lean-right reporting was available to weigh independently. Within that constraint, the administration's own filings and the majority itself framed the holding narrowly. Sauer conceded he was not defending the order's substance, only the timing of the challenge. The court reserved final judgment on lawfulness, writing that "time will tell" and leaving states free to sue again once DHS and the Postal Service act. The U.S. Court of Appeals for the D.C. Circuit, in a related case brought by Democratic campaign committees, made the same point last month: "If the defendant agencies take steps to implement the Executive Order in a manner that violates federal law or the Constitution, Plaintiffs can promptly seek relief."

What's next

California's promised suit is the next flashpoint. Mail ballots begin going out in some states within weeks; any restrictions the Postal Service or DHS impose will land on election officials mid-cycle. Control of Congress is on the ballot Nov. 3.