Gingrich makes this point well, but the MSM doesn't want it aired.
Regarding Santorum, I see him winning over a lot of voters because most of them don't know enough about his record. He has cynically abandoned the economy/jobs as an issue. It is THE issue on voters' minds. He is unpredictable and out of his league. He will be torn apart.
He has an 88% lifetime rating from the American Conservative Union. Newt has a 90% lifetime rating. In other words, there is very little difference between the two ideologically.