President Barack Obama talks backstage with Senior Advisor Valerie Jarrett before a reception at the Hyatt at the Bellevue in Philadelphia, Pa., June 30, 2011.

President Barack Obama talks backstage with Senior Advisor Valerie Jarrett before a reception at the Hyatt at the Bellevue in Philadelphia, Pa., June 30, 2011.

Oct. 30, 2010 "The President has lunch with Sen. Bob Casey at the Famous 4th Street Deli in Philadelphia. I love the woman in the background on the phone, probably alerting her family about her lucky seat."

Oct. 30, 2010
"The President has lunch with Sen. Bob Casey at the Famous 4th Street Deli in Philadelphia. I love the woman in the background on the phone, probably alerting her family about her lucky seat."

Reflected in a mirror, President Barack Obama poses with customers at the Famous 4th Street Deli in Philadelphia, Pa., Oct. 30, 2010.

Reflected in a mirror, President Barack Obama poses with customers at the Famous 4th Street Deli in Philadelphia, Pa., Oct. 30, 2010.

Oct. 10, 2010 "The sun was setting as the crowd watched the President speak at a campaign rally in Philadelphia."

Oct. 10, 2010
"The sun was setting as the crowd watched the President speak at a campaign rally in Philadelphia."

President Barack Obama tapes a video message at the Pennsylvania Convention Center in Philadelphia, Pa., Sept. 20, 2010.

President Barack Obama tapes a video message at the Pennsylvania Convention Center in Philadelphia, Pa., Sept. 20, 2010.

President Barack Obama greets the crowd after delivering remarks at a fundraiser for Sen. Arlen Specter (D-Penn.) in Philadelphia, Penn., Sept. 15, 2009.

President Barack Obama greets the crowd after delivering remarks at a fundraiser for Sen. Arlen Specter (D-Penn.) in Philadelphia, Penn., Sept. 15, 2009.