Republican Tom Smith, left, and Democratic U.S. Sen. Bob Casey shake hands at the end of a debate between Pennsylvania’s candidates for U.S. Senate, at the WPVI-TV studio, Friday, Oct. 26, 2012, in Philadelphia. Casey tried to paint his Republican challenger Tom Smith as someone who would worsen partisanship in Congress, while Smith contended he knows better than Casey how to improve the economy, as the two candidates largely stuck to rehearsed scripts in their first and only debate Friday. (AP Photo/Matt Rourke) Matt Rourke