I don't think we have the high calibur (honest) people in govt. that we'd need, to pull this off, so that the American taxpayer doesn't lose out more than they are, now.
We are so vulnerable to a terrorist nuclear attack along our southern border, I can't imagine it being worse, except that it actually happens.
And the problem isn't only with the "lefties" in both countries. Had we not so many people on both sides of the political spectrum, and from both countries, but mostly US citizens, heavily vested in making profit from the current immigration situation, the entire atmosphere would change.