The Republican signers of Sunday’s statement were Cornyn and Sen. Thom Tillis (N.C.), who led the talks for the GOP, as well as Sens. Blunt, Richard Burr (N.C.), Bill Cassidy (La.), Susan M. Collins (Maine), Lindsey O. Graham (S.C.), Rob Portman (Ohio), Mitt Romney (Utah) and Patrick J. Toomey (Pa.).