Trade union leader and international representative for the International Alliance of Theatrical Stage Employees (IATSE). President of the Motion Picture Alliance for the Preservation of American Ideals and vice-chairman of the Council Against Communist Aggression.
U.S. senator from 1943 to 1955 and 38th district California State Assembly member from 1936 to 1942. Head of the California Senate Factfinding Subcommittee on Un-American Activities ("Tenney Committee") and leader of anti-communist investigations.
Human rights activist and member of the American Civil Liberties Union (ACLU) National Advisory Council. Organizer of the Daniel Ellsberg Pentagon Papers defense team and president of the Los Angeles Board of Police Commissioners.