We have spent a dozen years now puzzling about, arguing about and gossiping about the state of their union. But one thing about the most intriguing couple in the U.S. is beyond dispute: they have made the Democratic Party a very different sort of political institution.
Bill Clinton wasn't joking when he made that two-for-the-price-of-one promise during the 1992 campaign. Everyone who knew them knew that his New Democrat philosophy had been the product of a two-decade dialogue that Bill and Hillary Clinton called "the conversation," which stressed personal responsibility and the sort of change that couldn't be labeled liberal or...