Probably the most bracing aspect of Ira Katznelson's new history of the New Deal, Fear Itself, is his portrait of the marriage of progressive domestic policy and white supremacy. I knew the outlines of this stuff, but for a flaming commie like me, the extent of the embrace is hard to take: Far more enduring was the New Deal's intimate partnership with those in the South who preached white supremacy. For this whole period -- the last in American history when public racism was legitimate in speech and action -- southern representatives acted not on the fringes but as an...