He was unethical in Congress, has a horrible reputation in and out of the party and is in it for Newt only. That's what I see in Newt.
Newt has never been a registered lobbyist. You're not going to find another politician in this country, either current or former, that doesn't make phone calls to other members of congress about either supporting or not supporting something. That's politics. If you want to label Newt a lobbyist, you're going to have to label every other candidate that way too. They've all made influential telephone calls.
Newt Gingrich has spoken about global warming or climate change, or what the heck ever they are calling it these days. What he NEVER did was take the position that GW was man made or that man could do anything substantial about it. He also NEVER was of the opinion that GW should be handled by government interference. He specifically stated that it should be handled by the free market system.
There were something like 84 ethics charges filed against Newt, and 83 of them were totally dismissed. They finally wore him down to accepting some responsibility for one of the charges and they fined him $300k. The charges were initially made by a democrat that ran against Newt for the house seat, and they were aggressively pursued by democrats. It was politics as usual.
The main reasons that most politicians will express negative comments on Newt is because he refuses to be politically correct and he doesn't play the inside politics games that they all play once they've been there for a while.
Newt Gingrich is far from perfect. He is always the smartest man in the room though. He is a man of ideas, and being such, he is going to come up with some real stinkers from time-to-time. Is every idea that you've ever had a winner? I doubt it.
Now ... I'll ask you again what I asked you the first time and you ignored in favor of repeating the talking points against Newt: What did Newt Gingrich ever promise and fail to do while he was in the house? If you're going to label folks fools for believing Newt, you're gonna have to back it up somehow.