Robert Duncan represented Jackson County in the Oregon House of Representatives (1957, 1957ss, 1959-speaker, 1961-speaker), represented the 19th District of Oregon in the 88th and 89th Congress (1963-1967), was an unsuccessful candidate for the United States Senate (1968, 1972), was elected to the 94th, 95th and 96th Congresses (1975-1981) and was unsuccessful candidate for renomination to the 97th Congress (1980).
From the description of Robert Duncan papers [manuscript], circa 1950-1981. (Oregon Historical Society Research Library). WorldCat record id: 727942116
From the guide to the Robert Duncan papers, circa 1950-1981, (Oregon Historical Society Research Library)