The leading proponents of the Dump Johnson Movement were two opponents of the war, Allard K. Lowenstein and Curtis Gans.
[2] Their first choice to be a candidate was Robert F. Kennedy, but the New York Senator declined after a series of meetings in September and October 1967.
Economist John Kenneth Galbraith showed willingness to run as the candidate until he was informed his Canadian birth to non-American parents made him ineligible for the office of President of the United States.
"[3] Johnson's thoughts of running received a fresh blow on March 12, 1968, when McCarthy shocked the country by winning 42 percent of the New Hampshire presidential primary,[4] at which point Kennedy belatedly entered the race, splitting the anti-war opposition between two candidates.
On Sunday evening, March 31, 1968, at the close of his televised address to the nation on Vietnam, Johnson declared, "I shall not seek, and I will not accept, the nomination of my party for another term as your President".