Daniel C. McKinney was a cattle rancher, a member of the Arizona Livestock Sanitary Board from 1931-32, and was president of the Arizona Cattle Growers’ Association in 1932. He worked with various credit banks and the Hearst Corporation analyzing livestock and ranching operations. McKinney also managed the primary campaign for Sidney P. Osborn, the Democratic nominee for Governor of Arizona in 1940. Years later he was a 1942 candidate for the Democratic nomination for Governor of Arizona.

The collection includes correspondence, financial papers, reports, and other related materials dealing with McKinney’s activities; particularly in the Arizona Cattle Growers’ Association, Arizona Livestock Sanitary Board, livestock interests of the Hearst Enterprises, the California Cattlemen’s Association, and various farm credit associations. Also included are political materials concerning Osborn’s 1940 campaign and McKinney’s own campaign in 1942.