The acid test of this growing openness may be the new Republican presidential front-runner, Newt Gingrich . His personal past is messier than most. He is on his third marriage, and he left his first two wives when they were in poor health and while he was having affairs. Also, his version of events is replete with gaps and changing and contradictory stories; both of his two former wives have questioned his moral character. Finally, he is the front-runner of a party in which a sizable chunk of the base consists of family-values conservatives who will have to decide between Mr. Gingrich’s rhetoric and his past.