Mitt Romney
U.S. senator from Utah, former Massachusetts governor
Republican National Committee
U.S. political committee that leads the Republican Party of the U.S., a/k/a The Grand Ol' Party/GOP
Joe Manchin
US Senator from West Virginia (2010-present)
Tim Murphy
Former US Representative from Pennsylvania (2003-2017)
Bob Schaffer
former US Representative from Colorado
Jim Inhofe
US Senator from Oklahoma (1994-present); former US Representative (1987-1995)
Sam Brownback
Governor of Kansas; Trump nominee to be Ambassador at Large for International Religious Freedom, Department of State
Rick Santorum
former US Representative and Senator from Pennsylvania