Santorum is a tough campaigner, and he will be enthusiastically supported by Christians and Catholics alike. Plus, all of the focus to date has been on Rick, and most of it has been negative. Once he and the RNC go after Casey the numbers should even out quickly. As for Spector, he is one tough and ambitious SOB, he has his dream job of being the Chairman of the Senate Judiciary Committee, and if anyone can rally he can, and I pray he does.
Right. Santorum is not only an incumbent, but he is part of the Senate leadership and is slated to be the next majority whip when McConnell moves up to the Majority leader spot. They won't let him be defeated without a huge fight.