[1] With Allard K. Lowenstein, Gans in 1967 started and headed the Dump Johnson movement.

Based on opposition to the Vietnam War, the movement, which was considered quixotic at first, grew strong and was instrumental in setting in motion events which eventually persuaded president Lyndon Johnson that continuing his campaign to be re-nominated for the presidency by his party would be difficult and divisive and uncertain of success.

Johnson withdrew his candidacy, an unusual event in American politics for a sitting president who had desired re-election.

[4][5] Additionally, he served as a consultant to the Woodrow Wilson Center for International Scholars, the National Committee for an Effective Congress, and managed a number of political campaigns.

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