George Voinovich
former US Senator from Ohio
Richard Green Lugar
Former Republican US Senator from Indiana
John Kerry
68th US Secretary of State, Senator from Massachusetts
Russ Feingold
Former US Senator from Wisconsin
Chris Dodd
President & CEO of MPAA; former Democratic US Senator from CT
Norm Coleman
Lobbyist at Hogan Lovells; Former US Senator from Minnesota
Ben Cardin
Democratic US Senator from Maryland (2007-present)
Barbara Boxer
Former US Senator and Representative from California
Joe Biden
46th President of the United States; Vice President; US Senator from Delaware
John Barrasso
US Senator from Wyoming (2007-present)