A coalition of 23 states and the District of Columbia filed a federal lawsuit challenging Trump's March 31 executive order restricting mail-in voting, arguing it "violates bedrock principles of federalism and separation of powers" by attempting to bypass the constitutional role of states and Congress in administering elections. The lawsuit, led by California, was filed in federal district court in Massachusetts. Attorney General Keith Ellison of Minnesota and Letitia James of New York were among the leads. A parallel lawsuit was filed by Senate Minority Leader Chuck Schumer, House Minority Leader Hakeem Jeffries, the DNC, and party campaign organizations.
The mail voting lawsuit brought the total number of Democratic attorney general lawsuits against the Trump administration to approximately 100 -- a milestone reached in early April 2026. Of the 67 cases with court rulings, the Democratic Attorneys General Association reported its members had won 55 of those challenges -- an 82% win rate. Oregon Attorney General Dan Rayfield alone has sued the administration more than 50 times. The sheer volume of litigation reflects an unprecedented level of state-federal legal conflict, with attorneys general functioning as one of the few remaining institutional checks on executive power.