The definitive biography of the most dangerous demagogue in American history, based on first-ever review of his personal and professional papers, medical and military records, and recently unsealed transcripts of his closed-door Congressional hearingsIn the long history of American demagogues, from Huey Long to Donald Trump, never has one man caused so much damage in such a short time as Senator Joseph McCarthy. We still use “McCarthyism” to stand for outrageous ch...