State's rights are a constitutional principle and will be - separate feelings and desires from Constitution. Santorum will fight for marriage - not just give a canned line about it.
Is that your stance? That it would be giving the federal government too much power to for it to step aside and let two loving people get married? That is f***ing crazy. It's a politically-acceptable copout for homophobes. I can't believe you're not wiser than that.
The only way we will ever protect states rights is a Federal Marriage Amendment that bars them from recognizing gay marriages!