President Barack Obama admires the crowd before his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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North Carolina delegates Denise Adams, left, and Charles Evans dance on the floor as musician James Taylor sings, "How Sweet It Is To Be Loved By You," during a sound check at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Former Rep. Gabrielle Giffords reacts after reciting the Pledge of Allegiance with Democratic National Committee Chairwoman Rep. Debbie Wasserman Schultz of Florida at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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An unidentified delegate tries to talk on the phone as Singer James Taylor performs at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Vice President Joe Biden appears on stage as he addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Former Michigan Gov. Jennifer Granholm addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Vice President Joe Biden looks up at the television monitor as he is nominated for a second term as Vice President during the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Vice President Joe Biden addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Vice President Joe Biden hugs his wife Jill after his speech at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Singer Mary J. Blige performs during the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama hugs his wife, first lady Michelle Obama, at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Ohio delegate Meredith Turner cries as former Rep. Gabrielle Giffords appears on stage at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Former Rep. Gabrielle Giffords blows a kiss after reciting the Pledge of Allegiance with Democratic National Committee Chairwoman Rep. Debbie Wasserman Schultz of Florida at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama waves after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama speaks to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama and First lady Michelle Obama waves to delegates as their daughters Malia and Sasha join them at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama, left, and Vice President Joe Biden wave to delegates at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Vice President Joe Biden and President Barack Obama wave to the delegates at the conclusion of Presdident Obama's speech at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama speaks at the Democratic National Convention in Charlotte, N.C., Thursday, Sept. 6, 2012.

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President Barack Obama addresses the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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From left, President Barack Obama, Dr. Jill Biden, First lady Michelle Obama and Vice President Joe Biden gather on stage after Barack Obama's speech at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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President Barack Obama waves with his wife Michelle and his daughters Malia and Sasha after his speech to the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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Vice President Joe Biden hugs his wife Michelle before addressing the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.

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