Mark Pryor
US Senator from Arkansas
Claire McCaskill
NBC/MSNBC contributor, former US Senator from Missouri
John McCain
US Senator and Representative from Arizona
John Kerry
68th US Secretary of State, Senator from Massachusetts
Daniel Inouye
US Senator and Representative from Hawaii
John Ensign
former US Senator and Representative from Nevada
Byron Dorgan
Former US Representative and Senator from North Dakota
Jim DeMint
Former President, Heritage Foundation | Former US Senator and Representative from South Carolina
Maria Cantwell
Democratic US Senator from Washington, Former House Member
Barbara Boxer
Former US Senator and Representative from California