@Robert Gentel,
Totally agree Robert.
He doesn't negotiate.
I see negotiation as resulting in a mutally satisfying outcome. Not threatening someone.
How different it would be if instead of "We're going to build a wall around Mexico, and THEY are going to pay for it", it was "I could like to see Mexico and the U.S. enter an agreement for keeping borders secure, where both countries benefit, and share the costs."
I was watching part of the movie Big Eyes last night. In it one of the main characters said something like "Ask for twice as much as you're willing to get. They counter with half that amount."
Any further counters back and forth from there will only benefit you.
Negotiation also doesn't involve demeaning someone. But that's another story.
In Trumps version of "negotiation", he gives a overblown ultimatum, then of course will back down to a middle position. Because he proclaims himself so explosively, it just makes him look like he doesn't stand by his word.
I mean, come on. Go into it not yelling my way or the highway. At least acknowledge there is a middle ground.