A woman enters the Charlotte Convention Center in Charlotte, N.C., on Tuesday, Sept. 4, 2012.
Actor Kal Penn, left, interviews first lady Michelle Obama at the Time Warner Cable Arena before the official start of the Democratic National Convention in Charlotte, N.C., on Monday, Sept. 3, 2012.
First lady Michelle Obama addresses the crowd gathered at the opening evening of the Democratic National Convention at the Time Warner Cable Arena in Charlotte, N.C., on Tuesday, Sept. 4, 2012.
First lady Michelle Obama, seen here on a TV feed inside the Time Warner Cable Arena, addresses the crowd gathered at the opening evening of the Democratic National Convention in Charlotte, N.C., on Tuesday, Sept. 4, 2012.
A helicopter hovers over the Time Warner Cable Arena during day two of the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012.
A woman watches the Democratic National Convention from the floor of the Time Warner Cable Arena in Charlotte, N.C., on Tuesday, Sept. 4, 2012
Eleazar Castellanos of Tucson, Ariz., chants with fellow protesters about immigration laws during a protest march titled “The March on Wall Street South” before the start of the Democratic National Convention in Charlotte, N.C., on Sunday, Sept. 2, 2012.
Delegates Kathy Huggins, left, of Philadelphia, and State Sen. Judy Schwank, D-Berks County, hold hands during the invocation at the final Pennsylvania Delegation breakfast at the Marriott SouthPark Hotel on day three of the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.
Sam Miller of Charlotte, dressed as President Abraham Lincoln, holds a sign that reads “Republicans for Obama” while standing on a sidewalk on South College Street during day two of the Democratic National Convention in Charlotte, N.C., on Wednesday, Sept. 5, 2012.
The crowd at the Democratic National Convention hold up signs saying “Thank You” to a group of veterans gathered onstage at the Time Warner Cable Arena in Charlotte, N.C., on Thursday, Sept. 6, 2012.
Vice President Joe Biden gives a fiery speech at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.
Stagehands work to setup for James Taylor at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.
President Barack Obama hugs his wife, Michelle, before accepting his party’s nomination and speaking at the Democratic National Convention in Charlotte, N.C., on Thursday, Sept. 6, 2012.