Brooks Simpson examines the policies of each administration in depth and evaluates them in terms of their political, social, and institutional contexts. Simpson explains what was politically possible at a time when federal authority and presidential power were more limited than they are now. He compares these four leaders' handling of similar challenges - such as the retention of political support and the need to build a southern base for their policies - in different ways and under different circumstances, and he discusses both their use of executive power and the impact of their personal beliefs on their actions.