After decades in the FBI, the top brass came to believe they could flout the law and pursue their own political agendas. One of the media and beltway orthodoxies we constantly hear is that just a few bad apples under James Comey at the FBI explain why so many FBI elites have been fired, resigned, reassigned, demoted, or retired — or just left for unexplained reasons. The list is long and includes director James Comey himself, deputy director Andrew McCabe, counterintelligence agent Peter Strzok, attorney Lisa Page, chief of staff James Rybicki, general counsel James Baker, assistant director for public...