After winning election to represent the state of Illinois in the Senate in 2004, Obama announced that he would run for president in February 2007. In the 2008 Democratic primary, Obama faced Senator and former First Lady Hillary Clinton. Several other candidates, including Senator Joe Biden of Delaware and former Senator John Edwards, also ran for the nomination, but these candidates dropped out after the initial primaries. In June, on the day of the final primaries, Obama clinched the nomination by winning a majority of the delegates, including both pledged delegates and superdelegates. Obama and Biden, whom Obama selected as his running mate, were nominated as the Democratic ticket at the August 2008 Democratic National Convention.
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