Mitt Romney
U.S. senator from Utah, former Massachusetts governor
George W Bush
43rd U.S. president, ex-governor of Texas, son of George H. W. Bush.
Denny Rehberg
US Representative from Montana
Republican National Committee
U.S. political committee that leads the Republican Party of the U.S., a/k/a The Grand Ol' Party/GOP
David McIntosh
Club for Growth president, former US Representative from Indiana
Rudy Giuliani
Trump adviser; former mayor of New York City
Jean Schmidt
US Representative from Ohio
Patrick Joseph Kennedy
Former US Representative from Rhode Island
Jim Cooper
US Representative from Tennessee