SG1 - your concerns with immigration are, I think, completely valid. However, when Trump runs a national ad campaign running on the platform that we'll build a wall and somehow "make Mexico pay for it", I just laugh. In some ways, a wall would help the same way that a lock on your door keeps honest people honest, but the wall in many ways would be an ineffectual as many other laws (gun laws are perfect example). Unless you turn it into the DMZ, we will ALWAYS have people finding a way across, albeit in lower numbers. If terrorists really want to get into the US, there are about a dozen ways that are quicker and easier.