I presume that's a joke
I actually think it's cool for Santorum to use middle-earth as a metaphor here. You guys are just being liberal nuts and randomly accusing him of things that aren't relevant; he's saying that he wants the "Eye of Mordor" attracted elsewhere, ie the target of the Evil (Al Qaeda/terrorism) to not target us, while we clean up the bad guys. I have no problem with that, and I think using classical literature that's down-to-earth and easy for Americans to understand is a step up.
Perhaps next he can tell us how going to Endor will save us