The only way I can see that this incredible immigration mess could be resolved to even a barely tolerable degree is to make hiring an illegal immigrant a crime punishable by a federal prison term for the employer and his representative who does the actual hiring. If employers know that they will likely serve hard time for hiring illegals they won't do it, and if illegals can't find jobs here millions of them will go home of their own volition. That, along with something resembling actual border security instead of the make believe version we have now, would solve a large portion of the problem within a couple of years IMHO.
But don't look for a law like that to ever be enacted. Employers at all levels from locally owned Stop N Rob stores to giant multinational agricultural corporations are thriving on cheap illegal labor, and they have much more influence on Congress and the White House than we mere worker bee peons will ever have. Unless of course we were to stick together long enough to vote their scoundrels out and vote our scoundrels in, and we're much too divided among ourselves on too many issues to do that.
He could have written... a when hell freezes over clause I guess...LOL