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The United States Senate career of Barack Obama began on January 4, 2005 and ended on November 16,...

The United States Senate career of Barack Obama began on January 4, 2005 and ended on November 16, 2008. In mid-2002, Obama began considering a run for the U.S. Senate, enlisting political strategist David Axelrod that fall and formally announcing his candidacy in January 2003. Before deciding to run, Obama met with Jesse Jackson Jr., who was known to be considering a bid for the seat. "He said, 'Jesse, if you’re running for the U.S. Senate I’m not going to run,'" Jackson said in recounting the conversation to The New York Times in 2008. Jackson told Obama he had already decided not to run. Decisions by Republican incumbent Peter Fitzgerald and his Democratic predecessor Carol Moseley Braun not to contest the race launched wide-open Democratic and Republican primary contests involving fifteen candidates. Obama's candidacy was boosted by Axelrod's advertising campaign featuring images of the late Chicago Mayor Harold Washington and an endorsement by the daughter of the late Paul Simon, former U.S. Senator for Illinois. He received over 52% of the vote in the March 2004 primary, emerging 29% ahead of his nearest Democratic rival. Obama's expected opponent in the general election,