At the center of the dispute is Trump’s executive order on citizenship verification and federal election integrity, which directs the Department of Homeland Security and the Social Security Administration to compile state citizenship lists, tells the Postal Service to begin a rulemaking on mailed ballots, and says states and localities should preserve certain election-related records for five years.
Why the mail-in voting fight is growing
A multistate lawsuit led by 22 states and the District of Columbia, joined by Pennsylvania Gov. Josh Shapiro says the order intrudes on the states’ constitutional role in running elections and could force last-minute changes before November. The White House has defended the policy as a lawful effort to secure elections and ensure only eligible citizens cast ballots.
Democrats opened a separate front in Washington. In a lawsuit filed by Senate Minority Leader Chuck Schumer, House Minority Leader Hakeem Jeffries and national party committees, the plaintiffs argue that the Constitution gives states and Congress — not the president — the authority to decide who may vote by mail. That complaint also points to the election calendar: in some jurisdictions, ballots for fall contests begin going out as soon as September.
Voting-rights and civil-rights organizations have added still more cases. An April 2 challenge led by the League of Women Voters and other national groups argues the order could turn USPS from a neutral delivery system into a gatekeeper for mailed ballots, while another Washington lawsuit from NAACP, Common Cause, Black Voters Matter and the Lawyers’ Committee for Civil Rights Under Law says the administration is trying to seize control of election administration through federal voter databases and mail-ballot restrictions.
What the mail-in voting order would change
The order goes well beyond general election-security language. It tells DHS to build a “State Citizenship List” of confirmed U.S. citizens who will be 18 or older by an upcoming federal election and reside in each state. It also directs the Postmaster General to begin a rulemaking within 60 days and issue a final rule within 120 days, including proposed requirements for official election-mail markings, unique barcodes and state-specific participation lists for people receiving absentee or mail ballots.
Supporters say those steps are designed to standardize safeguards and keep ballots from going to ineligible voters. Opponents counter that federal databases can be incomplete or outdated, that the president cannot rewrite election procedures on his own, and that any rushed transition would be especially disruptive for military families, overseas voters and voters with disabilities who rely on absentee or vote-by-mail systems.
Older mail-in voting battles help explain the stakes
This dispute did not begin with the March 31 order. In June 2025, a federal judge in Boston blocked key parts of an earlier Trump election order, finding that the president likely lacked authority to impose rules such as documentary proof of citizenship for federal voter registration and a ban on counting some timely mailed ballots that arrive after Election Day. That ruling helps explain why current challengers are framing the latest case as part of an ongoing separation-of-powers fight, not just a one-off policy dispute.
The Postal Service’s role in elections has also been litigated before. In December 2021, USPS and the NAACP settled litigation over election mail from the 2020 cycle, with the Justice Department saying the agreement would help prioritize ballot delivery in future elections. That earlier fight is part of the reason the new USPS rulemaking language is getting immediate scrutiny now.
What comes next for mail-in voting
The immediate question is whether judges move quickly to freeze any part of the order before states would need to adjust procedures for the 2026 midterms. The larger question is whether courts treat this as another temporary election fight or as a more lasting showdown over how much control a president can exert over state-run voting systems.
For voters and election officials, the stakes are practical: who gets to write the rules for mail-in voting, how those rules are enforced, and whether states can be pushed onto a federal timetable just months before ballots start going out.
