Interview with Allan Ryskind, author of "Hollywood Traitors: Agents of Stalin, Allies of Hitler." Were the blacklisted "Hollywood Ten" victims or thugs? Why does Hollywood continue to idolize them? Was Casablanca a film of pro-Soviet propaganda? Was Colorado-born Dalton Trumbo a communist? On Karl Marx v. Groucho Marx. On the legacy of Ronald Reagan. Plus music and listener calls.