Rep. Bobby ScottBobby ScottA guide to the committees: House Repeal without replacement: A bad strategy for kids House Dems press Trump for details on ObamaCare order MORE (D-Va.) announced Monday that he would not run for a Virginia Senate seat.

Scott endorsed former Virginia Gov. Tim KaineTim KaineSenate advances Carson’s nomination to lead HUD Senate confirms Zinke to lead Interior Kaine calls on FBI to probe threats against Jewish centers MORE (D) for the seat at a Labor Day event in Newport News, Va.

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“Though I believe I can win the Democratic nomination and the general election, a winning campaign would require me to devote all of my time for the next 14 months to that campaign," Scott said, according to The Associated Press. "This would mean that my work on issues critical to Virginians and other Americans would have to be postponed."

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.