Supreme Court Blocks Trump's Plan to Limit Mail-In Voting for Midterms

The U.S. Supreme Court has thwarted President Donald Trump's attempt to curb mail-in voting ahead of the November midterm elections, in a decision that Trump criticized on Tuesday as "horrible" and "highly political."

The controversy stems from an executive order Trump signed in March, directing the Postal Service to limit ballot distribution to voters listed on state-uploaded portals and to require tracking barcodes on election envelopes.

However, the Supreme Court has now upheld a lower court ruling that prevents the U.S. Postal Service from fully implementing Trump's directive.

In an unsigned order, the majority of justices found it "unlikely that the Government will succeed on the merits of its appeal" and reasoned that the potential harm to voters outweighed the executive's interests.

The only dissenters were conservative justices Samuel Alito and Clarence Thomas, who would have allowed the rules to take effect. None of the three justices Trump appointed during his first term—Brett Kavanaugh, Neil Gorsuch, and Amy Coney Barrett—joined the dissent.

Operational Challenges and Judicial Opinions

The issue is compounded by the fact that the portal was not yet operational at the time of the ruling, and several states had already started sending out envelopes that did not meet the new requirements. A whistleblower from the Postal Service warned Congress that the verification system was hastily assembled, not properly tested, and that a single code failure could lead to the rejection of entire batches of ballots.

Justice Kavanaugh penned a concurring opinion acknowledging that the plan might be lawful in the long run but emphasized that "state and local election officials do not have sufficient time to reasonably implement the rule before the elections." This stance was interpreted as a possible future support for the president in upcoming disputes.

Alito, in his dissent, argued that "the Postal Service has broad authority to regulate the mail" and that practical concerns were insufficient grounds to deny the government's request.

State Reactions and Political Implications

A coalition of about 24 states led by Democrats and voting rights advocacy groups challenged the measure, asserting that the Constitution grants states—not the federal government—control over election administration. Republican election officials also warned about the chaos a last-minute implementation could cause.

Colorado Secretary of State Jena Griswold unequivocally praised the decision: "Trump's attempt to sabotage the 2026 elections has failed." California Attorney General Rob Bonta called it a "victory for our democracy and a powerful reaffirmation of the rule of law."

Trump responded on Tuesday with a barrage of criticism on Truth Social against the very justices he appointed, as reported by CNN. "These are not the people I interviewed to serve on the U.S. Supreme Court; they are merely a shadow of what they once were," he wrote. In contrast, he praised Alito and Thomas as "legends."

The irony was not lost: Trump, who has long decried mail-in voting as prone to fraud without providing evidence, used that very method to vote in the Florida Republican primaries in August.

The midterm elections are set for November 3, and the ruling effectively closes the door on any changes to mail-in voting rules for this election cycle, although Kavanaugh’s concurring opinion leaves open the possibility of revisiting the issue in future electoral cycles.