Starting in Hollywood in the 1940s, Ronald Reagan developed a special relationship with the FBI. He became an FBI informer, reporting other actors whom he suspected of subversive activities, and later, when he became president of the Screen Actors Guild, the FBI had wide access to the Guild’s information on various actors. At one point, the Guild turned over information on 54 actors it was investigating as possible subversives — so the FBI viewed Reagan as an extremely cooperative source in Hollywood. He was far more active than we know from previously released FBI records. As a result of this, Hoover repaid him with personal and political favors later.