Dubinsky and Sidney Hillman, leader of the Amalgamated Clothing Workers, helped found the American Labor Party in 1936. the time Dubinsky and Hillman were both nominal members of the Socialist Party, although Dubinsky had, by his own admission, allowed his membership to lapse during the factional fighting of the 1920s. The Labor Party served as a halfway house for socialists and other leftists who were willing to vote for liberal Democratic politicians such as Roosevelt or Governor Herbert Lehman of New York, but who were not prepared to join the Democratic Party itself.