I’m not so sure. There are a lot of Santorum supporters who support him, even though they know he won’t likely win and Gingrich might. Why are they supporting Santorum? Likely because they can’t bring themselves to support Gingrich. But at least they still have a conservative they can support.
I guess some of them would force themselves to support Gingrich, IF there were no other choice. But some would probably just support Romney because they couldn’t bring themselves to support Gingrich. Others would support Paul. And some will just not vote at all.
Just look at the freepers. How many Santorum supporters got banned because they violated the rules about attacking Gingrich? YOu think they will vote for Newt if Santorum drops out?
Heck, half the Perry supporters went to Santorum, even though Perry endorsed Gingrich.