 In 1955, Holdridge again sought a nomination, this time as a vice-presidential candidate for the Prohibition Party.Placed on the ticket in September 1955, with law professor Enoch A. Holtwick as the nominee for president, Holdridge was replaced in August 1956 by Edwin M. Cooper, after Holdridge distributed virulently anti-Eisenhower pamphlets on the floor of the Republican Party nominating convention.Holdridge punctuated his non-election year with a fracas at a House Un-American Activities Committee hearing held in Los Angeles on December 7, 1956.