Barack Obama

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** FILE ** Then-Sen. Barack Obama campaigns for the presidency in 2008. (Associated Press)

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** FILE ** Then-Democratic presidential nominee Sen. Barack Obama plays basketball with the University of North Carolina's Jack Wooten in Chapel Hill, N.C., on April 29. (Associated Press)

Democratic presidential candidate Sen. Barack Obama D-Ill., and his vice presidential running mate Sen. Joe Biden, D-Del., appear together Saturday, Aug. 23, 2008, in Springfield, Ill. (AP Photo/M. Spencer Green)

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** FILE ** David Plouffe was manager of President Obama's campaign in 2008.

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** FILE ** Then-Sen. Barack Obama speaks at a presidential rally in Lancaster, Pa., on Sept. 4. (Associated Press)

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Sen. Joe Biden, D-Del., takes the stage as Democratic presidential candidate Sen. Barack Obama's vice presidential running mate Saturday, Aug. 23, 2008, in Springfield, Ill. (AP Photo/M. Spencer Green)

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Democratic presidential candidate Sen. Barack Obama is on vacation this week in Honolulu. But his campaign has not taken a break; 16 of the 18 states it deems as battlegrounds will see the new ad. (Associated Press)

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Barack Obama waves to the crowd as he delivers a speech at the victory column in Berlin Thursday, July 24, 2008, during a visit to Germany in the middle of his campaign to become U.S. president.

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Associated Press photographs Democratic presidential hopeful Barack Obama is positioned to give fellow senator Hillary Rodham Clinton a run for the campaign money in his bid for the presidency in 2008.

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Illinois Sen. Barack Obama waves after delivering Howard University's convocation address. In his speech, the Democratic presidential hopeful said he would end the sentencing disparity between crack and powder cocaine. (Antonio Franco/The Washington Times)