The latest executive order, issued March 31, calls for the Department of Homeland Security to work with the Social Security Administration to create lists of adult U.S. citizens in each state, and to send those lists to state election officials. It also calls for the U.S. Postal Service — a federal agency that’s independent of a president’s administration — to come up with lists of eligible voters and to only deliver mail-in ballots to people on those lists.

“The Court recognizes that the Postal Service may ultimately issue a final rule that directly affects Plaintiffs or their members, or that the Government may develop State Citizenship Lists that omit specific individuals due to particularized flaws. Plaintiffs may, of course, renew their motions if and when those future actions occur. Until then, however, Plaintiffs cannot show that preliminary injunctive relief is warranted,” Nichols wrote about the decision not to block the order.