USPS mail-ballot verification system raises alarm ahead of 2026 midterms

A whistleblower has alerted Congress that the United States Postal Service (USPS) is proceeding with a new system to enforce restrictions on mail-in voting ordered by President Donald Trump. The concern is that technical errors in the system could lead to legitimate ballots being rejected or delayed.

Senator Richard Blumenthal, a Democrat, has taken up the matter, requesting documents and answers from Postmaster General David Steiner. The senator has described the system as requiring an "impracticable zero percent failure rate."

Under the proposed mechanism, a single failure to match a ballot to an approved voter could impact an entire batch. For instance, if election officials delivered 10,000 ballots and one voter had recently changed their name or moved, the other 9,999 ballots could also be refused for delivery. This raises the risk that administrative or computer errors could disenfranchise eligible voters.

The system stems from an executive order signed by President Trump in March, which directed the Department of Homeland Security to provide states with voter eligibility information and instructed the Justice Department to prioritize investigations into officials issuing ballots to ineligible individuals. The order also required USPS to deliver mail ballots only to voters on each state's approved mail-ballot list.

While the administration frames these measures as election security enhancements, critics argue that adding verification steps within the postal system creates new avenues for legitimate ballots to be rejected. USPS has not yet commented on the allegations.

The executive order is already facing legal challenges. The Supreme Court recently lifted a lower-court injunction that had blocked implementation, but a separate injunction on a key part of the plan remains active. This leaves the administration with some room to proceed while the broader legal fight continues.

The timing is significant as the 2026 congressional midterm elections are scheduled for November. Mail voting is widely used in the US, especially by those unable to vote in person. Any system that delays or rejects legitimate ballots could affect voter access. While President Trump has repeatedly claimed mail voting is vulnerable to fraud, documented cases of such fraud remain rare.