It's an arguable point. It's entirely possible that we are now joined at the hip. We depend on illegals to work our agriculture and factories and washrooms. Mexico depends on money mailed south - its about 35% of their GNP. Cut off the back and forthing and both countries suffer. I think you might enhance the possibilities the drug cartels take control of Mexico if you close the border. The government would most certainly collapse.
But the drug trade - it will just take to sea and sky, only a bit more than they already do.
I heard a Stratfor report the other day that estimates 50% of major crime in our major cities is from drug cartels - mostly Mexican and other Latin countries.
Eventually, we will need to become very repressive to put a stop to it - not likely in the next four or 8 years.
We can’t even stop it in maximum security prisons, so I don’t know what all is planned for those of us not presently in such institutions. But I’m sure it’s going to be a doozy, one small step at a time.
Mexico may be just the ticket that we need to turn out of this depression - we invade Mexico, a convenient little war gets the economy going in both nations - the people in Mexico like us, so we get cooperation in cleaning up the nation. Mexico buys a ton of technology and equipment from us and puts us to work making it. We set up the Mexican government as an entity friendly to their poor. In exchange, think of all the thousands of acres of ocean-front property heretofor prohibited to American ownership...the building out of tourist spots will keep Mexico’s economy humming for decades, the airlines will be fat as cows flying people back and forth and everyone will be happy campers. And, we’ll have control of the border all the way from Belize to Guatamala.