Roxanne Conlin
Attorney, Des Moines Iowa
John Edwards
Former U.S. Senator from North Carolina
Sheldon Whitehouse
US Senator from Rhode Island (2007-present)
Sherrod Brown
Democratic US Senator from Ohio (2007-present); former US Rep from Ohio (1993-2007)
Bob Menendez
Democratic US Senator and Representative from New Jersey
Claire McCaskill
NBC/MSNBC contributor, former US Senator from Missouri