Hillary Clinton changes images with the quickness of Madonna. Like the Queen of Pop, she provokes and reacts, rethinks and reforms, pushes at hot buttons and then cools off with a dip in the mainstream. Madonna moved from "Like a Virgin" to "Married With Children," and began writing children's books. Hillary went from high-octane lawyer in Little Rock who didn't want to stay home to bake cookies to being a first lady sharing her recipe for chocolate chip cookies. She went from standing by her man in a way that Tammy Wynette might have sung about, to standing up for...