Turk was in private practice in
Radford, Virginia from 1952 to 1972, mostly with the firm of Dalton,
Poff & Turk. Voters in
Franklin,
Montomery and
Roanoke Counties and the city of
Radford elected Turk to represent them (part-time) in the
Virginia State Senate in November 1959. He served until 1972, and was minority leader from 1965 to 1972. However, his district's boundaries and number changed drastically, both as a result of the
Massive Resistance controversy engulfing Virginia, as well as reapportionments necessitated by census changes, the
Voting Rights Act of 1965 and U.S. Supreme Court decisions (especially
Davis v. Mann in 1963). Turk initially replaced fellow Republican
Ted Dalton (his law partner) who had represented the same 21st district, and who had become U.S. District Judge for the Western District of Virginia (a position Turk later also secured). Turk also followed Dalton's footsteps in helping to end Massive Resistance and the domination of the
Byrd Organization. For the 1963 elections, the district covering the same counties and city was renamed the 20th, and the 21st became what had been the 22nd. The restructuring in the 1965 elections was major: Montgomery and Franklin Counties and the city of Radford were now joined as the 13th district with
Carroll and
Floyd Counties and the city of
Galax (which had been represented as the 14th district by Republican
S. Floyd Landreth, who had been the only other Republican in the Senate when Turk began, and who now retired). Restructuring after the 1970 census also proved major: Turk was elected from the 37th district, which included the cities of Radford and Galax, as well as Carroll, Floyd,
Grayson and Montgomery Counties. Upon Turk's resignation upon becoming a federal judge, as discussed below,
John N. Dalton replaced him. ==Federal judicial service==