How about cosponsoring an economy0-destroying environmental bill with Nancy Pelosi in 1989. That bill alone should disqualify him for running for dog catcher as a Republican. And there was no reason for him to do it. No pressure from the caucus. That bill was way way ahead of it's time. The fact that he would cosponsor that communistic bill for no reason is a major black mark against him. I can't think of a single excuse why he'd be party to that.
There are some problems in his voting record, but it is statistically slightly more conservative than Santorums - which is ironic - because many of Santorum’s followers and Santorum himself wants folks to believe he is actually far more conservative than Newt. That’s my main point with that.
And Santorum did get more and more liberal the longer he stayed in congress (first the House then the senate).