In order to support the POTUS and Rick Santorum, so I disagree with that premis of yours
YOU WILL NEVER EVER GET ANYONE AS GOOD AS SANTORUM IN PA AGAIN IF YOU LET HIM LOSE THE ELECTION!!
I agree. If Santorum goes down the PA GOP powers that be will field nothing but RINO's.
Purely politically speaking, it would be foolish of the voters in PA to vote out Santorum. He would be the next Majority Whip, a very powerful position with great clout. In addition to that, if the GOP lost the majority as a result, their other Senator would lose his powerful committee chairmanships.
Not to mention the fact that Santorum has stuck his neck out for conservatives and taken the beatings from the press numerous times. Amazingly there are people on this forum that call him a liberal. Those people are simply too dishonest and/or too stupid to be listened to.