Abstract This collection pertains to Montana State Senator, Willliam R. Mackay (1911-1999). Mackay served as a Montana State Representative from 1950 to 1952 and as a State Senator from 1953 to 1972. Materials include personal correspondence and legal records, along with ephemera, professional correspondence, financial records, business-related legal records, minutes, organizational materials, published materials, press releases and radio broadcasts, reports, speeches, subject files, and writings....