(CNN) – Pennsylvania Sen. Arlen Specter made huge headlines when he switched parties for the second time last spring. The former Republican-turned-Democrat is campaigning for re-election this fall, but he's facing fierce competition from both sides.
Democratic Rep. Joe Sestak is trying to beat Specter in a May Democratic Party primary. The latest poll from Franklin and Marshall College shows his Republican challenger, Pat Toomey, out in front by four points with a huge number of voters still undecided. Our Jessica Yellin got a chance to talk with the five-term senator and his two competitors.