Julian Castro, mayor of San Antonio, speaks during an interview inside the Bloomberg Link during day three of the Democratic National Convention (DNC) in Charlotte, North Carolina, U.S., on Thursday, Sept. 6, 2012. Four years after the nation made history by electing him the first African-American president, Barack Obama asked for a second term with a pledge to keep rebuilding a battered economy in a way that “may be harder but it leads to a better place.” Photographer: David Paul Morris/Bloomberg via Getty Images
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