Sen. Arlen Specter, D-Pa. is projected at left, behind a cardboard cutout of President Barack Obama, as he speaks at Netroots Nation, a gathering of self described progressive bloggers and online activists in Pittsburgh,  Friday, Aug. 14, 2009. Specter spoke to the convention before his opponent, Rep. Joseph Sestak, D-Pa. , in the upcoming primary election for his U.S. Senate seat. AP Photo logo AP Photo 3 months ago

Sen. Arlen Specter, D-Pa. is projected at left, behind a cardboard cutout of President Barack Obama, as he speaks at Netroots Nation, a gathering of self described progressive bloggers and online activists in Pittsburgh, Friday, Aug. 14, 2009. Specter spoke to the convention before his opponent, Rep. Joseph Sestak, D-Pa. , in the upcoming primary election for his U.S. Senate seat.