One of the ideas behind globalization was to precisely keep a nation's energetic, enterprising, and talented individuals in their nation of origin, and to provide them with the capital and processes to be successful.  It's worked well in Mexico, which is why the flow of Mexican immigrants into the US is no longer a one way street and is in fact moving the other way.

I don't see where isolationism and aggressive deportation is going to solve anything.  It will have disastrous effects on agriculture alone.  And of course, as always, the GOP never ever mentions doing a thing about the companies who hire illegals or immigrants.....like Trump Inc.