Rep. Bobby Scott (D-Va.) announced Monday that he would not run for a Virginia Senate seat.
Scott endorsed former Virginia Gov. Tim Kaine (D) for the seat at a Labor Day event in Newport News, Va.
Scott's decision clears the way for Kaine to gain the Democratic nomination. He is expected to face former Virginia Sen. George Allen (R) in the general election.
The race to succeed retiring Sen. Jim Webb (D-Va.) will be one of the most competitive races in 2012.