Could Newt have changed? Absolutely, I would hope he really has for his family's sake. Would I want to take that chance with him as president? Hell, no.
As I said either in this thread or another, I detest the "do as I say, not as I do" mentality of politicians. And him criticizing Clinton while he himself was having an affair was and is still pathetic. If I were to lay his politics aside (cause I wouldn't vote for him anyway because of just that), what it all comes down to is I simply do not trust the man.