Francois de La Rochefoucauld had a point when he said, in his frequently quoted formulation, that hypocrisy is the tribute that vice pays to virtue. In the case of John Edwards, however, hypocrisy is simply a way of life. The infamous $400 haircut — actually, some of his hairstyling sessions ran as much as $1,200 all told — wasn’t a freak embarrassment for a candidate so self-righteously devoted to the poor. It was part of a pattern so pervasive that it has become the defining aspect of Edwards’s candidacy. When he lambasted hedge funds for incorporating offshore to avoid or...