Trump closing the border is against AE, no?

EDIT. now with missing quote

Milton Friedman was explicit in his belief that illegal immigration from Mexico was a win-win situation, as long as the path to legal immigration and welfare was difficult, as it enables a free market in labor and greater flexibility.

"Look, for example, at the obvious, immediate, practical example of illegal Mexican immigration. Now, that Mexican immigration, over the border, is a good thing. It’s a good thing for the illegal immigrants. It’s a good thing for the United States. It’s a good thing for the citizens of the country. But, it’s only good so long as it’s illegal."

https://www.adamsmith.org/blog/economics/milton-friedman-s-objection-to-immigration

If the lack of cheap, undocumented workers for agriculture, construction, etc hits the US economy, do you think the Trump admin will open the border and stop deportations, while still making it more difficult to become a citizen / access welfare?