Did he say that Mexico had agreed to the wall? Someone said that earlier in this thread.
No. Trump said they discussed The Wall, but not who would pay for it. (By saying it this way, The Wall is already envisioned by all parties and by everyone present and watching; huge win.)
Mexican president came out with boilerplate. Competently enough done, and an opening positive bridge to future negotiations.
Then Trump came out with a 5-point plan. Total vision.
BOOM.
It was incredible.