Saw a post yesterday that included Linda Graham (RINO-SC).
From the article, here are Senators who signed letter against the treaty:
Jon Kyl (R-Ariz.), Jim Inhofe (R-Okla.), Roy Blunt (R-Mo.), Pat Roberts (R-Kansas), David Vitter R-La.), Ron Johnson (R-Wis.), John Cornyn (R-Texas), Jim DeMint (R-S.C.), Tom Coburn (R-Okla.), John Boozman (R-Ark.), Rand Paul (R-Ky.), Jim Risch (R-Idaho), Mike Lee (R-Utah), Jeff Sessions (R-Ala.), Mike Crapo (R-Idaho), Orrin Hatch (R-Utah), John Barrasso (R-Wyo.), Richard Shelby (R-Ala.), John Thune (R-S.D.), Richard Burr (R-N.C.), Saxby Chambliss (R-Ga.), Dan Coats (R-Ind.), John Hoeven (R-N.D.), Roger Wicker (R-Miss.), Marco Rubio (R-Fla.), Jerry Moran (R-Kansas), Dean Heller (R-Nev.), Pat Toomey (R-Penn.), Chuck Grassley (R-Iowa), Mitch McConnell (R-Ky.)