Joining Thune, Cortez Masto, Johnson, and Cuellar in sending the letter were Sens. John Barrasso (R-Wyo.), Roy Blunt (R-Mo.), John Boozman (R-Ark.), Mike Braun (R-Ind.), Richard Burr (R-N.C.), Bill Cassidy (R-La.), John Cornyn (R-Texas), Kevin Cramer (R-N.D.), Mike Crapo (R-Idaho), Ted Cruz (R-Texas), Tom Cotton (R-Ark.), Steve Daines (R-Mont.), Mike Enzi (R-Wyo.), Joni Ernst (R-Iowa), Deb Fischer (R-Neb.), Cory Gardner (R-Colo.), Chuck Grassley (R-Iowa), Josh Hawley (R-Mo.), John Hoeven (R-N.D.), Cindy Hyde-Smith (R-Miss.), Jim Inhofe (R-Okla.), Doug Jones (D-Ala.), Tim Kaine (D-Va.), James Lankford (R-Okla.), Kelly Loeffler (R-Ga.), Martha McSally (R-Ariz.), Jeff Merkley (D-Ore.), Jerry Moran (R-Kan.), David Perdue (R-Ga.), Jim Risch (R-Idaho), Pat Roberts (R-Kan.), Jacky Rosen (D-Nev.), Mike Rounds (R-S.D.), Ben Sasse (R-Neb.), Kyrsten Sinema (D-Ariz.), Thom Tillis (R-N.C.), Mark Warner (D-Va.), Roger Wicker (R-Miss.), Ron Wyden (D-Ore.), and Todd Young (R-Ind.).

Representatives who joined in sending the letter were Reps. Robert Aderholt (R-Ala.), Rick W. Allen (R-Ga.), Kelly Armstrong (R-N.D.), Jodey Arrington (R-Texas), Cindy Axne (D-Iowa), Brian Babin (R-Texas), Don Bacon (R-Neb.), Troy Balderson (R-Ohio), Dan Bishop (R-N.C.), Rob Bishop (R-Utah), Sanford Bishop (D-Ga.), Mike Bost (R-Ill.), Kevin Brady (R-Texas), Anthony Brindisi (D-N.Y.), Cheri Bustos (D-Ill.), Steve Chabot (R-Ohio), Liz Cheney (R-Wyo.), Ben Cline (R-Va.), Michael Cloud (R-Texas), Tom Cole (R-Okla.), James Comer (R-Ky.), K. Michael Conaway (R-Texas), Jim Costa (D-Calif.), TJ Cox (D-Calif.), Rick Crawford (R-Ark.), John R. Curtis (R-Utah), Warren Davidson (R-Ohio), Rodney Davis (R-Ill.), Jeff Duncan (R- S.C.), Neal P. Dunn (R-Fla.), Tom Emmer (R-Minn.), Ron Estes (R-Kan.), Abby Finkenauer (D- Iowa), Bill Flores (R-Texas), Jeff Fortenberry (R-Neb.), Russ Fulcher (R-Idaho), Greg Gianforte (R-Mont.), Bob Gibbs (R-Ohio), Louie Gohmert (R-Texas), Anthony Gonzalez (R-Ohio), Vicente Gonzalez (D-Texas), Sam Graves (R-Mo.), H. Morgan Griffith (R-Va.), Michael Guest (R-Miss.), Brett Guthrie (R-Ky.), Jim Hagedorn (R-Minn.), Andy Harris (R-Md.), Vicky Hartzler (R-Mo.), Kevin Hern (R-Okla.), French Hill (R-Ark.), Kendra S. Horn (D-Okla.), Richard Hudson (R-N.C.), Will Hurd (R-Texas), Trent Kelly (R-Miss.), Ron Kind (D-Wis.), Steve King (R-Iowa), David Kustoff (R-Tenn.), Darin LaHood (R-Ill.), Doug LaMalfa (R- Calif.), Robert E. Latta (R-Ohio), Dave Loebsack (D-Iowa), Billy Long (R-Mo.), Frank Lucas (R-Okla.), Ben Ray Luján (D-N.M.), Roger Marshall (R-Kan.), John Moolenaar (R-Mich), Alex X. Mooney (R-W. Va.), Markwayne Mullin (R-Okla.), Dan Newhouse (R-Wash.), Collin C. Peterson (D-Minn.), David Price (D-N.C.), Denver Riggleman (R-Va.), Martha Roby (R-Ala.), Mike Rogers (R-Ala.), John Rose (R-Tenn.), David Rouzer (R-N.C.), John Rutherford (R-Fla.), Austin Scott (R-Ga.), Terri A. Sewell (D-Ala.), John Shimkus (R-Ill.), Mike Simpson (R-Idaho), Adrian Smith (R-Neb.), Jason Smith (R-Mo.), Darren Soto (D-Fla.), Abigail D. Spanberger (D- Va.), Pete Stauber (R-Minn.), Bryan Steil (R-Wis.), W. Gregory Steube (R-Fla.), Chris Stewart (R-Utah), Steve Stivers (R-Ohio), GT Thompson (R-Pa.), Mac Thornberry (R-Texas), Xochitl Torres Small (D-N.M.), Juan Vargas (D-Calif.), Filemon Vela (D-Texas), Steve Watkins (R- Kan.), Randy K. Weber (R-Texas), Brad R. Wenstrup (R-Ohio), Bruce Westerman (R-Ark.), Roger Williams (R-Texas), Steve Womack (R-Ark.), Ron Wright (R-Texas), and Ted S. Yoho (R-Fla.).