How did a nice, liberal Jewish boy from the Bronx come to be called a conservative? Ben J. Wattenberg has been at the center of American ideas and events since 1966, when he became a speechwriter for and aide to President Lyndon B. Johnson. Recruited out of the blue, Wattenberg worked closely with press secretary Bill Moyers and immersed himself in the world of high-powered Democratic strategy making. Eventually he served as an adviser to two Democratic...