What did Joseph McCarthy do in the 1950s?

In the 1950s, Joseph McCarthy, a U.S. Senator from Wisconsin, became a prominent figure in the anti-communist movement during the Cold War. He led a campaign to expose alleged communists in the government, entertainment industry, and other sectors, often using aggressive and unsubstantiated tactics. His actions led to a period of intense fear and suspicion known as McCarthyism, characterized by public accusations, blacklisting, and violations of civil liberties. Ultimately, his influence waned after the televised Army-McCarthy hearings in 1954, which showcased his bullying tactics and contributed to his loss of credibility.