McClintic accepted a position with a wholesale dry-goods company in
St. Louis, Missouri in 1901. In 1902, he became a traveling salesman. He moved to
Snyder,
Oklahoma Territory, in 1902, where he opened the Texas Store, a mercantile business. He then homesteaded a farm in
Texas County in 1906. After returning to Snyder, McClintic was elected city clerk in 1908. One year later, he served as clerk of
Kiowa County, Oklahoma in 1909. When the southern portion of Kiowa County broke away to form
Swanson County, with Snyder as its county seat, he was elected to the
Oklahoma House of Representatives. He served as Swanson County's representative from January 3, 1911, until the dissolution of the county on June 27 of that year. He served in the
Oklahoma Senate in 1913 and 1914. Having studied law at
Georgetown University,
Washington, D.C., McClintic was admitted to the
bar in 1928 and licensed to
practice in all the courts of Oklahoma. McClintic was elected as a
Democrat to the
64th Congress and to the nine succeeding Congresses and served from March 4, 1915, to January 3, 1935. During the
65th Congress, he was chairman of the Committee on Expenditures on Public Buildings. He failed to receive his party's nomination in 1934. From 1935 to 1940, McClintic was the executive assistant to the
Governor of Oklahoma. He then served as an administrative assistant in the District of Columbia Department of Vehicles and Traffic in 1940 and 1941. McClintic once again attempted to secure a Democratic Party nomination to fill a vacancy in the
67th Congress, but was again unsuccessful. However, he returned to Washington as special assistant to the
Secretary of the Interior, serving from 1941 to 1944. As a member of the Readjustment Division of the
War Department he served in 1944 and 1945. He then resumed the practice of law. ==Death==