Our cows aren't starving. Do you see the incongruence between boasting about record low unemployment and a strong economy (its faltering is due in substantial part to Mr. Trump's poor economic decisions), and simultaneously leading people to believe we're in such dire straits we're in peril if we permit desperately impoverished immigrants from crossing our borders? Illegal border crossings have fallen dramatically in the past two decades, prior to the building of fences. The OP's article explains that in regards to El Paso, but you must scroll down to read that part of the article. There are more immigrants in the United States without permission who came here legally and then overstayed than there are those who crossed at the southern border. Another incompatibility is that Republicans have advocated for a higher allotment of visas for unskilled labor, and employers are mostly bringing in these workers from Central America. Democrats have been in opposition to this because of the established abuses of the system - the workers are exploited because of their vulnerability, given a below-legal wage, and also devaluing the work. The same OP of this thread made another one recently about how there are no jobs Americans will not do, which is true, but Americans will not do the jobs unless they are given legal wages and in conditions compliant with legal standards. A trio of Republican senators proposed that the number of visa be doubled last year, and Mr. Trump's properties have long employed foreigners for cheap labor. The FBI and state investigators are currently investigating his golf clubs for hiring undocumented workers.
Another important matter to note is that the United States has benefitted from aid given to us by other countries. In natural disasters countries around the world have sent in trained people to do what was needed, and given us supplies. Mexico saved many American lives following Hurricane Katrina. I've been volunteering in the Panhandle of Florida that was decimated by Hurricane Michael last October and in the parts of California ravaged by fires and met people from around the world who came here to give us aid. Also, the United States is trillions in debt to China and Japan, and has borrowed billions from Ireland and Brazil. We're also billions of dollars in debt to Saudi Arabia.