Samuel Dickstein was a Democratic Congressional Representative from New York, a New York State Supreme Court Justice, and a Soviet spy. He played a key role in establishing the committee that would become the House Committee on Un-American Activities, which he used to attack fascists, including Nazi sympathizers, and suspected communists. In 1999, authors Allen Weinstein and Alexander Vassiliev learned that Soviet files indicate that Dickstein was a paid agent of the NKVD.
"Cliff Dwellers" by George Bellows, depicting Lower East Side of the early 20th century
Tammany Hall politician John F. Ahearn was Dickstein's political mentor
John William McCormack (later 45th Speaker of the United States House of Representatives) was Dickstein's co-chair
House Un-American Activities Committee
The House Committee on Un-American Activities (HCUA), popularly the House Un-American Activities Committee (HUAC), was an investigative committee of the United States House of Representatives, created in 1938 to investigate alleged disloyalty and subversive activities on the part of private citizens, public employees, and those organizations suspected of having communist ties. It became a standing (permanent) committee in 1946, and from 1969 onwards it was known as the House Committee on Internal Security. When the House abolished the committee in 1975, its functions were transferred to the House Judiciary Committee.
Chairman Martin Dies of the House Un-American Activities Committee proofreads his October 26, 1938 letter replying to President Roosevelt's attack on the committee.
Lee Slater Overman headed the first congressional investigation of American communism back in 1919.
Texas Democrat Martin Dies Jr. served as chair of the Special Committee on Un-American Activities, predecessor to the permanent committee, for its entire seven-year duration.
Democrat Francis E. Walter of Pennsylvania was chair of HUAC from 1955 until his death in 1963.