Sun, 24 Jun 2012 15:20:53 GMT — COLUMBIA, S.C. (AP) - South Carolina's primary runoffs will determine party nominees to fill the slots of two legislators not seeking re-election and one Senate chairman toppled in a five-way primary. Tuesday's three legislative runoff elections will determine the Republican nominee vying to replace retiring Democratic Sen. Phil Leventis of Sumter. It will also determine the Democrat likely to replace Democratic Rep. Boyd Brown of Winnsboro and the Republican taking the seat from Senate Banking Committee Chairman David Thomas. Thomas is a seven-term veteran. The Greenville senator came in third in a five-way GOP primary. The winner of that runoff will not face a Democrat in November. Thomas' primary was the most contested race of any incumbent. Leventis is retiring after 32 years in the Senate. The 25-year-old Brown is stepping down after two terms.