Kit Bond
Former US Senator from Missouri (1987-2011); former Gov. of Missouri
John W. Warner III
US Senator from Virginia
Max Baucus
former US Senator and Representative from Montana
Sheldon Whitehouse
US Senator from Rhode Island (2007-present)
George Voinovich
former US Senator from Ohio
David Vitter
lobbyist, former US Senator and Representative from Louisiana
Bernie Sanders
Independent US Senator and former representative from Vermont, 2016 and 2020 Democratic presidential primary candidate
Joe Lieberman
Former US Senator for CT (1989-2013); Vice President nominee (2000)
Frank Lautenberg
US Senator from New Jersey
Amy Klobuchar
US Senator from Minnesota, 2020 Democratic presidential primary candidate