Please note that the last of those occured in 1997. It’s the stuff he did since then that has many concerned. I’m not typing this to change minds, simply to point out why Santorum’s positives are much higher than Gingrich’s at the moment.
Deliberately lying about Newt for his own gain is not what I consider a positive. You may since you support him. No matter what he'll never get my vote. Liars for their own gain are repulsive to me. He has a lot in common with mitt with their deliberately lying to American voters - and that's not conservative nor patriotism. So whatever he 'says' is coming out of a lying heart/mouth.