Like many politicians, Newt has an inflated ego. He also has a tendency to snap when he gets his feelings hurt. When he was Speaker he was carrying on an affair very similar to the one President Clinton was having with an intern. It was their fellow Republicans in both cases, Nixon and Newt, who demanded their resignations.
Thank you for the explanation. I think I'd agree that Gingrich will probably be similar to Nixon if he is elected.