The Supreme Court has stopped the Trump administration from imposing new mail-ballot requirements before the 2026 midterms, averting an immediate disruption while preserving a larger fight over federal power and election administration.

In its unsigned order, the Court said the government was “unlikely to succeed on the merits” of its challenge to a nationwide injunction blocking the rules.¹ The decision means states can continue using existing procedures as voting gets underway, avoiding a last-minute overhaul of envelope designs, voter lists and USPS approval processes.

The ruling’s practical rationale was stronger than its final legal judgment. Justice Brett Kavanaugh, who joined the majority, wrote that the rules might ultimately fall within USPS authority but that applying them in 2026 would be “arbitrary and capricious” because election officials lacked enough time to implement them.¹ Critics said the system was not ready and warned that technical failures could prevent ballots from being sent or accepted. The League of Women Voters called the policy an attempt to “throw our elections into chaos.”²

The conservative position focused instead on statutory authority, fraud prevention and the limits of the challengers’ case. Justice Samuel Alito, joined by Clarence Thomas, argued that the government had a strong interest in enforcing the rule to “enhance the visibility of Federal Ballot Mail” and detect election fraud.³ He also maintained that some plaintiffs lacked standing and that others were making a “Hail Mary pass.”³

Both sides therefore read the ruling as temporary, but for opposite reasons. Voting-rights groups see a necessary safeguard against administrative chaos; the administration’s allies see a procedural defeat that does not settle whether USPS can regulate ballot mail in future elections. Kavanaugh’s concurrence keeps that question alive, ensuring the legal dispute will continue well beyond November.