In 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 charges of guilt by association, a weapon of polarizing slander. From 1950 to 1954, McCarthy destroyed many careers and even entire lives, whipping the nation into a frenzy of paranoia, accusation, loyalty oaths, and terror. When the public finally turned on him, he came crashing down, dying of alcoholism in 1957. To help explain his complicated life we interview Larry Tye who is a New York Times bestselling author who has written numerous books including Bobby Kennedy: The Making of a Liberal Icon, Rising from the Rails, and recently wrote DEMAGOGUE: The Life and Long Shadow of Senator Joseph McCarthy. Previously, he was an award-winning reporter at The Boston Globe, where his primary beat was medicine. He also served as the Globe’s environmental reporter, roving national writer, investigative reporter, and sportswriter. Before that, he was the environmental reporter at The Courier-Journal in Louisville, and covered government and business at The Anniston Star in Alabama.