"Of all the mob bosses that I ever saw, he was more surly," Drummond said. Giancana was the notorious boss of the Chicago Outfit for 1957 to 1966 — only nine years, but an eventful nine years.

Chicago mob historian John Binder says the movie got it wrong. Binder, a retired University of Illinois-Chicago professor and Ph.D., has studied the 1960 election and assertions that Outfit vote ...