Mitt Romney
U.S. senator from Utah, former Massachusetts governor
John McCain
US Senator and Representative from Arizona
Chuck Grassley
US Senator and Representative from Iowa (1981-present); former US Representative (1975-1981)
Dave Camp
former US Representative from Michigan
Al D’Amato
US Senator from New York; Park Strategies
Bill Cassidy
US Senator and former Representative from Louisiana
Robert Guy Torricelli
Lobbyist, former US Representative and Senator from New Jersey
Barack Obama
44th President of the United States