There was great indignation and much disapproval last year when it was reported that President Trump had asked then-FBI Director James Comey for "loyalty." Such a request, it was said, was more characteristic of a mob boss than a president -- "mob boss" being a phrase Comey himself would use in a book whose title (A Higher Loyalty) he took from the president's request. Now, Comey's book and the revelations it has triggered are casting new light on the "loyalty" issue -- a light that makes Trump's position look far more understandable. The short version is this: In Trump's first...