CHARLOTTE, NC – SEPTEMBER 06: Sasha Obama, First lady Michelle Obama, and Malia Obama walk on stage to join Democratic presidential candidate, U.S. President Barack Obama after accepting the nomination 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 Streeter Lecka/Getty Images)