Like John Bolton, William Barr knew everything he needed to know about Trump when he was offered the AG job. He understood perfectly well that Trump was capricious and corrupt and vastly more committed to his own interests than those of the nation. He accepted the job, anyway, because his agenda largely meshed with Trump’s, and because he thought he was smart enough to keep the man on golf cart under control.
Guess again, big guy! He probably thinks he salvaged his reputation by resigning. What he really did was point out how stupid he was to work for Trump in the first place. He’s a moron, not a martyr.