I have made up my mind. I can't get peace in Vietnam and be President too. So begins this posthumously discovered account of Lyndon Johnson's final days in office. The Thirty-First of March is an indelible portrait of a president and a presidency at a time of crisis, spanning twenty years of a close working and personal relationship between Johnson and Horace Busby. It was Busby's job to put a little Churchill into Johnson's orations, and his skill...