The one thing that absolutely shows is that this president has absolutely no understanding of the well-known college-level Basics of Negotiating 101. That is, in any high-level negotiation, the final decision-maker should never be in the room. This is a clearly understood fact in government and business negotiations that apparently this president has not remotely understood and has scarily jumped on, much to our peril.
When the ultimate decision-maker is in the room, whatever s/he says is now clearly considered as final. Which then formally restricts any subsequent and ultimate negotiations related to that openly stated decision.