Truman and Johnson Also Stepped Aside, but the Circumstances Are Quite Different'Only two Democratic presidents in the last 75 years chose not to run for re-election during an election year, with the resulting nominees losing the general election to Republicans.
President assemble: Obama can reach parts of Democratic base Biden can'tThree living Democratic presidents united at a fundraising event, showcasing party unity before the presidential election.Obama and Clinton's potential as influential surrogates for Biden in his reelection campaign highlighted.