Thanks for the link,
Again, the only solution seems to be enforcement (perhaps combined with some rearrangement of immigration law) , which costs money, which the American public (represented by "Congress") refuses to pay for or acknowledge the need for.
Oh wait, I've only been seeing this since I moved close to the border in '63 as a kid.
Nothing has changed in all these years.
You border folks, stay safe.
Geno