But behind the scenes, it was an administration-wide scramble. As with many presidential “announcements,” this once sprang from intense frustration and boiled over quickly with staff rushing to react.

Key point: While the plan was hurried out the door to appease Trump, he has been privately talking about doing this for a while, per two sources who’ve discussed it with him.

Between the lines: The White House has made a number of immigration demands of Mexico over the past several months, but Trump has not defined what they need to show him.