McCarthy lost support in 1953 when he started attacking the U.S. Army and suggesting that Republican President Dwight D. Eisenhower was protecting subversives. Eisenhower signaled Republicans to stop his attacks on the Army. Although McCarthy had strong support among Catholics, such as Joe Kennedy, in 1954 the Senate censured him on charges of attacking fellow Senators; this caused his influence to collapse abruptly.
Joe McCarthy (Joseph Raymond McCarthy, November 14, 1908 – May 2, 1957) was a two-term Republican United States Senator from Wisconsin. He dominated the anti-communist movement in the United States, 1950–54, until his career receded after censure by the Senate. "McCarthyism" is the aggressive exposure of Communist influences in America and the people who protect them.