In a quiet but consequential reversal, the United States Postal Service has ceased development of a computer system designed to constrain mail-in voting — one of the Trump administration's most tangible instruments in its long campaign to reshape how Americans participate in elections. The halt, announced by the USPS chief in September 2026, arrives amid a pattern of legal and administrative resistance, including a Supreme Court rebuff, that has steadily narrowed the administration's path forward. For the millions of voters — elderly, disabled, or serving abroad — who depend on postal ballots,