When congressional aide John F. Clark met his future boss, South Carolina Congressman John Jenrette, in 1975, he was awestruck. Jenrette seemed to be everything Clark was looking for in a leader. With intense charisma and uncanny knowledge of how Washington worked, Jenrette seemed poised to lead a New South and destroy the common stereotype of white southerners as narrow-minded racists. Jenrette was indeed all the things Clark hoped him to...