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 | Democratic presidential candidate, Sen. Barack Obama, D-Ill., greets supporters as he arrives at a rally in Pittsburgh, Monday, Oct. 27, 2008  click to open  |  | U.S. Democratic Presidential nominee Senator Barack Obama (D-IL) greets supporters during a campaign rally in Pittsburgh, Pennsylvania, October 27, 2008. Obama is campaigning in Ohio and Pennsylvania on Monday before the November 4 election. click to open |  | Supporters cheer for Democratic presidential candidate, Sen. Barack Obama, D-Ill., at a rally in Pittsburgh, Monday, Oct. 27, 2008. click to open |
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