New Quinnipiac poll out today shows Santorum still trailing Casey badly, 51-36. Santorum is not only way behind Casey among independents (52-29), he's only getting 70% support among his own party at this point, with 21% of Republicans saying they'll vote for Casey.

Santorum's job approval rating is at an all-time low of 43% (not coincidentally, President Bush scored his lowest job approval in this poll as well at 37%) and his reelect number is a dismal 41%.  If there's a silver lining for Santorum in this poll, I can't find it.