The Mafia and many political machines ran entire American cities in the 19th and 20 centuries. But some mobsters claim that it went much further than that. Chicago-area Sam Giancana claims that he and the mafia "owned" Presidents Franklin Roosevelt and then Harry Truman, whose career they promoted; that they had all-star athletes in their pocket, including Joe DiMaggio, Mickey Mantle and Willie Mays; and that Giancana conspired with other top Mafia bosses, as well as Hoffa, Vice President Lyndon Johnson, Nixon, top CIA officials, top military officials, top Dallas police officials, top Texas oilmen etc. etc. to assassinate John F. Kennedy.
How much of this is true and how much is fiction? We will never know completely, but the roots of the mafia run deep in the soil of American politics.