When the idea surfaced publicly some years ago, I thought of it as a joke. But then Israel started building one, and soon thereafter the speculations in the US gained foothold, and now: the money has been granted, they are gonna build one too:
A wall!
A wall, stretching for the Pacific through California, Texas, Arizona, New Mexico: A 1200 kilometer long wall, to keep the Mexicans out of the US. 6 billion dollars approx. is the price, and still it leaves a 2000 kilometer gap open.
“Mr. Gorbatjov, , tear down this wall” said iconographic Reagan in 1987 visiting Berlin, and basically Mr. Gorbatjov did, and for a while there in the early nineties Europe looked prosperous.

And for the States? Instead of spending the money developing the countries from where the illegal immigrants originate… I mean…jesus...or making laws against hiring illegal immigrants, on building a economy that does not include modern slavery…I mean…
Poor Mexico, So far From God, so near the USA…