US Postal Service to Block Mail Ballot Delivery in States That Refuse to Provide Voter Lists Under Trump Plan
State election officials in the United States may soon face a major decision under proposed Postal Service rules tied to President Donald Trump’s March 2026 executive order on mail-in voting: share voter lists with the federal government or risk losing Postal Service delivery of mail ballots. The proposal would require states to provide lists of voters set to receive mail ballots, along with related tracking information, before USPS will handle those ballots. If implemented, the plan could give the federal government a much larger role in election administration and potentially place sensitive voter data in the hands of Trump officials who say they are searching for election fraud.
The proposal has already triggered broad legal resistance. Twenty-three Democratic-led states and the District of Columbia, along with Democratic Party organizations and voter advocacy groups, have filed lawsuits challenging the order and the USPS rules. A federal judge in Washington, D.C., recently declined to block the order immediately, allowing USPS to begin moving forward, but that decision did not settle the legality of the policy. Democrats are now pressing an appeals court for a faster review, warning that the rules could disrupt voting in the midterm elections if not stopped soon. State officials such as Maine Secretary of State Shenna Bellows and Oregon Secretary of State Tobias Read argue that the federal government has no constitutional authority to control mail voting, saying states run elections.
The White House says the administration is acting lawfully and remains committed to election security. But critics, including former USPS officials and postal unions, say the Postal Service is being pushed beyond its core mission and into a role that could determine whether ballots are accepted or rejected. Union leaders have raised concerns that mail carriers and postal administrators could end up deciding whether certain election mail is transmitted at all if a state does not comply exactly with the new requirements.
The executive order also directs the Department of Homeland Security to build state-by-state citizenship lists, raising fears that the administration could use federal data to pressure states into purging voter rolls. DHS and the Justice Department say the department is working on making citizenship information available to states and that conversations about data sharing are underway. Election officials and voting rights advocates, however, warn that such databases can be inaccurate and may wrongly flag eligible voters as non-citizens.
There are also major practical questions about whether USPS can implement the proposal quickly or effectively. The agency would need to create a portal for state submissions, standardize data formats, and manage barcode tracking systems for ballots. Election administrators say many states and local jurisdictions, especially smaller and rural ones, may not have the budget, technology, or time to redesign ballot envelopes and reporting systems. Experts note that while some large mail-voting counties already use similar tracking tools, a nationwide rollout would be difficult because election data formats vary widely from state to state.
The broader fight reflects Trump’s continuing effort to tighten federal control over voting rules and restrict mail-in voting, despite repeated court resistance and no evidence of widespread voter fraud.
