W.C. Fields, Will Rogers, Bert Williams, and Fanny Brice were delighted to share the stage with him. Franklin D. Roosevelt, Harry Truman, Al Smith, and other eminent politicians admired him and sought his support. He founded the March of Dimes, raised millions for the new state of Israel, and remains the only American entertainer ever to reign successively as the biggest star on Broadway, in the movies, and on radio. But while his name still brings...