The letter is signed by Reps. Andy Biggs, R-Ariz.; Scott DesJarlais, R-Tenn.; Jeff Duncan, R-S.C.; Matt Gaetz, R-Fla., Paul Gosar, R-Ariz.; Andy Harris, R-Md.; Jody Hice, R-Ga., Scott Perry, R-Pa.; and Ralph Norman, R-S.C.