Peter Welch
US Representative from Vermont (2007-present)
Elizabeth Warren
US Senator from Massachusetts; Harvard law professor; Chair of Congressional Oversight Panel; 2020 Democratic presidential primary candidate
Barack Obama
44th President of the United States
Ben Cardin
Democratic US Senator from Maryland (2007-present)
Michael Everett Capuano
US Representative from Massachusetts
Richard Carmona
Former US Surgeon General; 2012 candidate for US Senate from Arizona
Tim Kaine
Virginia US Senator (2013-present); former Virginia governor; 2016 Clinton VP running mate
Angus King
US Senator from Maine (2013-present); former Governor of Maine
Martin Heinrich
US Senator from New Mexico (2013-present); former US Rep from New Mexico