Santorum's beliefs are completely in line with Catholic teaching that sexual intercourse has two primary functions: unitive and procreative. It unites the man and woman in their relationship (which includes having fun during the process) while the couple is open to the possibility of conceiving a child. That doesn't mean that you must intend on conceiving a child, only that you are open to it. That's why Natural Family Planning is promoted (works just fine) as no contraception is used.
As far as how his Catholic beliefs will play during the general election, he needs to have a JFK-like moment that his beliefs are his beliefs, and why the "bleep" is everyone obsessed with them when we have an econony teetering on the edge of destruction. If he doesn't do that, he'll be letting the libertine liberal scumbag media define the election.
We are not electing a Catholic first. We are electing a President capable of fixing this mess. And for Decades, Santorum has proved to the World he has no clue how to do that.
It's simple really........Besides. Newt is all the Catholic we will need, since he does not cram it down our throats, or wear it on his sleeve.