Cindy McCain's parents Jim and Marguerite "Smitty" Hensley are shown in the 1940s. Jim launched what eventually became Arizona's largest distributor of wholesale Anheuser-Busch beer, Hensley and Company, a successful business that generated great wealth. It's estimated that Cindy McCain's fortune amounts to $100 million.
Learn more about potential first lady Cindy McCain this Friday on "20/20" as Diane Sawyer anchors "Portrait of a President" at 10 p.m. ET. (Courtesy McCain Family)