A leader who is a Christ carrier will do best in the situation, even if this person has a very checkered past. God is in the business of forgiving pasts and rebuilding futures, if only accepted (He will not do it against our wills).
SAntorum hasn’t asked forgeness for his “checkered” past of those who he so greatly offended.
He’s not in this to win the Pres...they are using him for another purpose.