The House Committee on Un-American Activities (HCUA)(1947–1975) was an investigative committee of the United States House of Representatives. In 1969, the House changed the committee's name to "House Committee on Internal Security". When the House abolished the committee in 1975, its functions were transferred to the House Judiciary Committee.

The committee's anti-Communist investigations are often confused with those of Senator Joseph McCarthy. McCarthy, as a U.S. Senator, had no direct involvement with this House committee. McCarthy was the Chairman of the Permanent Subcommittee on Investigations of the Government Operations Committee of the U.S. Senate, not the House.

The Overman Committee was a subcommittee of the Committee on the Judiciary chaired by Democratic Senator from North Carolina Lee Slater Overman that operated from September 1918 to June 1919. The subcommittee investigated German as well as Bolshevik elements in the United States.

The Committee was originally concerned with investigating pro-German sentiments in the American liquor industry. After World War I ended in November 1918 and the German threat lessened, the Committee began investigating communist Bolshevism. Bolshevism had appeared as a threat during the First Red Scare after the Russian Revolution in 1917. The Committee's hearing into Bolshevik propaganda, conducted February 11 to March 10 of 1919, had a decisive role in constructing an image of a radical threat to the United States during the First Red Scare.

Ronald Wilson Reagan ( /ˈrɒnəld ˈwɪlsən ˈreɪɡən/; February 6, 1911 – June 5, 2004) was the 40th President of the United States, serving from 1981 to 1989. Prior to that, he was the 33rd Governor of California from 1967 to 1975 and a radio, film and television actor.

Born in Tampico, Illinois and raised in Dixon, Reagan was educated at Eureka College, earning a Bachelor of Arts degree in economics and sociology. After his graduation, Reagan moved first to Iowa to work as a radio broadcaster and then in to Los Angeles in 1937 where he began a career as an actor, first in films and later television. Some of his most notable films include Knute Rockne, All American, Kings Row, and Bedtime for Bonzo. Reagan served as president of the Screen Actors Guild, and later as a spokesman for General Electric (GE); his start in politics occurred during his work for GE. Originally a member of the Democratic Party, his positions began shifting rightward in the late 1950s, and he switched to the Republican Party in 1962. After delivering a rousing speech in support of Barry Goldwater's presidential candidacy in 1964, he was persuaded to seek the California governorship, winning two years later and again in 1970. He was defeated in his run for the Republican presidential nomination in 1968 as well as 1976, but won both the nomination and general election in 1980, defeating incumbent Jimmy Carter.

Newton Leroy "Newt" Gingrich ( /ˈnjuːt ˈɡɪŋɡrɪtʃ/; born Newton Leroy McPherson; June 17, 1943) is an American politician, author, and political consultant. He represented Georgia's 6th congressional district as a Republican from 1979 until his resignation in 1999, and served as the 58th Speaker of the U.S. House of Representatives from 1995 to 1999. Gingrich was a candidate for the 2012 Republican Party presidential nomination.

In the 1970s, Gingrich taught history and geography at the University of West Georgia. During this period he ran twice (1974 and 1976) for the United States House of Representatives before winning in November 1978. He served as House Minority Whip from 1989 to 1995.

A co-author and architect of the "Contract with America", Gingrich was a major leader in the Republican victory in the 1994 congressional election. In 1995, Time named him "Man of the Year" for "his role in ending the four-decades-long Democratic majority in the House". While he was House speaker, the House enacted welfare reform, passed a capital gains tax cut in 1997, and in 1998 passed the first balanced budget since 1969. The poor showing by Republicans in the 1998 Congressional election and pressure from Republican colleagues caused Gingrich's resignation from the speakership on November 5, 1998, and then the House on January 3, 1999.