U.S. President Barack Obama (L) and Vice President Joe Biden attend a rally at Vernon Park in Philadelphia October 10, 2010.
PHILADELPHIA - OCTOBER 10: U.S. President Barack Obama (R) speaks with supporters as U.S. Vice President Joe Biden (L) sits by at the Moving America Forward rally October 10, 2010 in Philadelphia, Pennsylvania. Obama and Biden are urging Democrats to come out and vote in the November 2, 2010 general election.
PHILADELPHIA - OCTOBER 10: U.S. Vice President Joe Biden laughs after President Obama remarked that he looked cool in his sunglasses at the Moving America Forward rally October 10, 2010 in Philadelphia, Pennsylvania. Obama and Biden are urging Democrats to come out and vote in the November 2, 2010 general election.
US President Barack Obama gestures that he can't hear the crowd during a 'Moving America Forward' rally with US Vice President Joe Biden (L), in Philadelphia, Pennsylvania, October 10, 2010.
US President Barack Obama speaks during a 'Moving America Forward' rally in Philadelphia, Pennsylvania, October 10, 2010.
U.S. President Barack Obama and Vice President Joe Biden attend a rally at Vernon Park in Philadelphia, October 10, 2010.
Supporters greet US President Barack Obama after speaking during a 'Moving America Forward' rally with US Vice President Joe Biden, in Philadelphia, Pennsylvania, October 10, 2010.
President Barack Obama greets the crowd a rally in Philadelphia, Sunday, Oct. 10, 2010.
President Barack Obama is cheered by supporters in Philadelphia, Sunday, Oct. 10, 2010, as he rallies voters for the midterm elections.
President Barack Obama is cheered by supporters in Philadelphia, Sunday, Oct. 10, 2010, as he rallies voters for the midterm elections.
Vice President Joe Biden, energized after a Democratic rally with President Obama, pops out from a covered security tent, in Philadelphia, Sunday, Oct. 10, 2010.
President Barack Obama and Vice President Joe Biden are seen during a rally in Philadelphia, Sunday, Oct. 10, 2010.