Given events of the last six months, I would say the odds of Santorum being accused of having an affair with some skank in the Chicago area are way better than chance. She will probably remain anonymous, and disappear once the damage is done.
I think you’ll find that Santorum’s scandals are more in the financial line. I think that incident where he defrauded a local school district to get free district-paid on-line “home schooling” for his kids while he was a resident of another state, and then let the State of PA pay the $50,000 fine is going to come up again, and I also think it’s just the tip of the iceberg.
Heck, he was up to his eyebrows in the K Street project (getting fat lobbyist jobs for GOP congress critters) and I am sure you will find a lot of odd financial goings on in his career as a lawyer, particularly considering some of the entities for which he worked.
He’s a dishonest person who always shades the truth because even when it’s not something illegal, the unshaded truth would be unflattering and not part of the image he wants to project (humble little Ricky, pure as the driven snow, just ascending the steps to the pulpit bathed in light...come to think of it, didn’t Obama use that approach too?).
I think it’s unlikely that he’ll be the nominee, but if he is, you can expect a revelation a day about his financial and career activities.