Republicans

Sen. John Hoeven

Senator for North Dakota

Sen. John Barrasso

Senator for Wyoming

Sen. John McCain

Senator for Arizona

Sen. Lisa Murkowski

Senator for Alaska

Sen. James Lankford

Senator for Oklahoma

Sen. Steve Daines

Senator for Montana

Sen. Michael Crapo

Senator for Idaho

Sen. Jerry Moran

Senator for Kansas

Democrats

Sen. Tom Udall

Senator for New Mexico

Sen. Maria Cantwell

Senator for Washington

Sen. Jon Tester

Senator for Montana

Sen. Brian Schatz

Senator for Hawaii

Sen. Heidi Heitkamp

Senator for North Dakota

Sen. Catherine Cortez Masto

Senator for Nevada

Sen. Tina Smith

Senator for Minnesota