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David then married Sinclair Oil heiress Virginia Sinclair (daughter of Harry Ford Sinclair) in 1944, and they had a son, Michael (1945-1990).
Harry Sinclair's high-profile image as a reputable American business leader and sportsman came under question in April 1922 when the Wall Street Journal reported that United States Secretary of the Interior Albert B. Fall had granted an oil lease to Sinclair Oil without competitive bidding.
Sinclair Oil Company also owns and operates Grand America Hotels and Resorts, which has hotel properties in Salt Lake City, Utah; Flagstaff, Arizona; Cheyenne, Wyoming; Little America, Wyoming; and San Diego, California, in addition to the Sun Valley and Snowbasin resorts.