Mike Coffman
Former US Representative from Colorado
Republican National Committee
U.S. political committee that leads the Republican Party of the U.S., a/k/a The Grand Ol' Party/GOP
National Republican Senatorial Committee
Campaign committee for Republican U.S. Senate candidates
Mitt Romney
U.S. senator from Utah, former Massachusetts governor
Cory Gardner
former US Senator, representative from Colorado
Jeb Bush
Former Governor of Florida
John McCain
US Senator and Representative from Arizona