A coalition of Republican lawmakers used Election Day to join a 31-state lawsuit opposing the Obama administration’s far-reaching Waters of the U.S. rule in federal court.

“Through the WOTUS rule, the agencies seek to expand their authority … beyond the scope established by Congress,” the coalition, led by Sen. Jim Inhofe of Oklahoma and Rep. Bob Gibbs of Ohio, said in a friend of the court brief filed Tuesday in the U.S. Sixth Circuit Court.