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CHARLOTTE, NC - SEPTEMBER 06: Democratic presidential candidate, U.S. President Barack Obama stands on stage after accepting the nomination with his family, (L-R) Malia Obama, Sasha Obama, and First lady Michelle Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Tom Pennington/Getty Images)

CHARLOTTE, NC - SEPTEMBER 06:  Democratic presidential candidate, U.S. President Barack Obama stands on stage after accepting the nomination with his family, (L-R) Malia Obama, Sasha Obama, and First lady Michelle Obama during the final day of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. The DNC, which concludes today, nominated U.S. President Barack Obama as the Democratic presidential candidate.  (Photo by Tom Pennington/Getty Images)