I have no polls or macro data to support it, but I can say every Newt supporter I know...a couple of dozen...would puke, then pull the lever for Romney over Santorum.
They will not vote for the Church Lady.
I am sure that differs by region and state.
Just remember, Santorum ALREADY has those who vote "values first". He has them all.
Values first voters are not Gingrich supporters. Generally they are "values too" voters.
And none of them have ever heard of Free Republic and what I pointed out, is unanimous among them.