STEVEN J. ROSS is the distinguished professor of history and director of the University of Southern California’s Casden Institute for the Study of the Jewish Role in American Life. His recent book, The Secret War Against Hate: American Resistance to Antisemitism and White Supremacy (Bloomsbury), was nominated for a Pulitzer Prize and National Book Award. His previous book, Hitler in Los Angeles: How Jews Foiled Nazi Plots Against Hollywood and America, was a Pulitzer Prize finalist in history and remained on the Los Angeles Times bestseller list for 23 weeks. He is also the author of Hollywood Left and Right: How Movie Stars Shaped American Politics and Working-Class Hollywood: Silent Film and the Shaping of Class in America.