In the nation's varied memory, Robert Kennedy is a contradictory figure, a hard-bullying McCarthyite obsessed with Hoffa and Castro but also a gentle, poetry-reading herald of a new age bent on stopping the Vietnam War and lifting up the poor. As Evan Thomas ( The Wise Men and Man to See ) writes, both liberals and conservatives have their own spin on his legacy, with predictably different visions of what he would have done if he had lived to be our 37th president