I think you've got it backwards. U.S. companies and super rich people are driving this.
It is not backwards.
Fact #1 : People coming illegally from Mexico are poor and low skilled.
Fact #2 : Many corporations have moved their manufacturing operations to Mexico. Thanks to NAFTA, they can then import the manufactured products from Mexico to USA. more easily.
Fact #3 : I never said US Companies and super rich people are NOT doing this. You are exactly right, those are exactly the people who are doing it.
Fact #4 : Congress critters such as senator Rubio & senator Cruz obey their super rich campaign donors and vote for trade pacts.