"Fascism: Could it happen here?" That’s a question increasingly being raised as Republican presidential front-runner Donald Trump continues his bid for the White House. People as varied as actor George Clooney, comedian Louis C.K. and Anne Frank’s stepsister Eva Schloss have suggested Trump is a fascist. Earlier this month, Mexican President Enrique Peña Nieto criticized Trump by invoking the fascist dictators Adolf Hitler and Benito Mussolini. Trump has retweeted quotes by Mussolini. Is Donald Trump really a fascist? We put the question to the father of fascism studies, Robert Paxton, professor emeritus of social science at Columbia University and author of several books, including "The Anatomy of Fascism."