Excerpts from Books and Wikipedia
"Between April and June in televised hearings watched by an estimated 20 million viewers, the army's counsel, Joseph N. Welch, showed McCarthy up to devastating effect as a vicious bully and liar.… In September the unanimous report of a Senate committee denounced McCarthy's behavior as 'inexcusable' and 'reprehensible,' and in December the Senate formally condemned him by 67 votes to 22. He remained a senator, but his day was done and he died in 1957 of acute hepatitis." [1001 Days]