How is increasing the availability and reliability of our supply chain harmful to America? How is encouraging relocation to the border of millions of illegal aliens harmful to America? How is creating job openings for Americans once they relocate harmful to America? There are tremendous economic positive effects for both Americans and northern Mexico. None of this has anything to do with "sovereignty".
Study NAFTA. Sounds like a great idea, doesn’t work.
How about we just physically boot out the invaders and build manufacturing in, to use the leftists’ vile term, “flyover country” and the Mexicans can find their own way. Mexico is rich in resources and does not need our help.