Supreme Court Upholds Block on Mail Ballot Verification Rules

The Supreme Court on Monday night turned aside an emergency request from the Trump administration, leaving in place a lower court order that prevents the U.S. Postal Service from enforcing new requirements on mail ballots for the November midterms. The unsigned order means states can continue distributing ballots under the procedures they have used for years, avoiding the risk of last-minute redesigns and data-sharing mandates that election officials said could not be implemented in time.

The dispute centers on an executive order President Trump issued in March directing the Postal Service to create a federal system for tracking mail ballots. The resulting rule would have required states to submit envelope designs for approval, upload lists of voters to a new federal portal, and affix unique barcodes to every ballot. Challengers, including two dozen Democratic-led states and voting rights groups, argued that the changes would impose unbudgeted costs, create confusion among voters, and risk disenfranchising people whose ballots had already been mailed in states such as Alabama, North Carolina, and Wisconsin.

Justice Brett Kavanaugh wrote a concurrence agreeing that the rule should not take effect this year. He noted a fair prospect that the Postal Service possessed statutory authority for the changes, yet concluded that applying them with only weeks remaining before the election would be arbitrary and capricious under the Administrative Procedure Act. Election officials, he observed, lacked sufficient time to adapt their systems.

Justices Samuel Alito and Clarence Thomas dissented. Alito argued that the Postal Service holds broad authority to regulate mail and that several plaintiffs lacked standing to bring the suit. He described the legal theory advanced by the states as a “Hail Mary pass” unlikely to succeed on full review. The two justices framed the rule as a legitimate effort to detect fraud, a concern Trump has repeatedly raised even though mail ballots have been used for decades and account for roughly one-third of all votes cast.

The decision caps weeks of rapid litigation that began after the Postal Service published its final rule in late August. A federal district judge in Massachusetts issued first a temporary restraining order and then a preliminary injunction, both of which the administration sought to lift at the Supreme Court. The Court’s earlier 6-3 ruling in August had allowed the Postal Service to proceed with drafting the rule but left open the question of its timing. Monday’s order effectively closes that window for 2026.

Mail voting has expanded steadily since the 1990s and is now the dominant method in eight states plus the District of Columbia. Research from multiple academic and government sources has found that it raises turnout without increasing fraud rates above the very low levels observed in in-person voting. The Trump administration’s proposal would have centralized significant new data with federal authorities, a step opponents said raised both logistical and federalism concerns.

With ballots already in the mail in several states, the ruling allows local officials to focus on administering the election rather than retrofitting their processes. The underlying legal questions about the scope of Postal Service authority and the limits of emergency rulemaking remain live for future election cycles, though the immediate disruption has been averted.