Dear Donald, We’ve known each other a long time, so I think I can be blunt. You know how you said at campaign rallies that you did not like being identified as a politician? Don’t worry. No one will ever mistake you for a politician. After this past week, they won’t even mistake you for a top-notch negotiator. I was born here. The first image in my memory bank is the Capitol, all lit up at night. And my primary observation about Washington is this: Unless you’re careful, you end up turning into what you started out scorning. And you,...