Former CIA Director John O. Brennan is an angry man, and his anger mismanagement issues emerge not in the preface to his memoir but in its title, which reads Undaunted: My Fight Against America’s Enemies, at Home and Abroad. The CIA is an executive branch organization focused on foreign intelligence, intentionally headquartered across the Potomac in McLean, Virginia, separated from the White House, State Department, Congress, and all the other policy and partisan bodies. So, who are a CIA director’s domestic enemies—terrorist sleeper cells? Russian illegals? Shady companies aiding Iran’s nuclear procurement efforts? These would be valid targets for joint...