The Trump campaign sued Nevada to stop legislation that would expand mail-in voting ahead of the 2020 election.

The campaign, in conjunction with the Republican National Committee and the Nevada Republican Party, filed the lawsuit Tuesday night against Republican Secretary of State Barbara Cegavske in the U.S. District Court for the District of Nevada, arguing that the Nevada bill, which Gov. Steve Sisolak, a Democrat, is expected to sign, is unconstitutional.