WASHINGTON — 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, Donald, are getting a reputation as a sucker. And worse, a sucker who is a tool of the D.C. establishment.