There will always be a huge illegal immigration problem with poor populations trying to get into richer societies...as long as there is gross economic inequality remaining in the world. Keep in mind that Big Business wants that gross economic equality to be perpetuated so that they can move their manufacturing and labor jobs to countries where where the labor is dirt cheap. Those countries can (usually) be controlled by keeping them under the rule of rich bullies with large armies and police forces, and those bullies are also the friends of big business worldwide. If a country refuses to play ball with Big Business, then it can be invaded, destablilized or embargoed into submission...

See the magnitude of the problem? It's not just a problem existing within the borders of the USA. It's a world problem, and it has to do with the haves (the very rich) and the have-nots. It's the same problem the world has been facing for the last several thousand years. Further excuses will be found to arrest, deport, and kill the less cooperative have-nots, I assure you.