What if "closing the border" leads to a recession, or worse yet, another 10-year depression - would that be worth it?!
We can get labor anywhere and anytime we want from the third world - we don't need to leave the border open and exposed. And keeping net drains on the economy out is not going to cause a recession. If all that cheap labor were such an economic stimulus, Mexico wouldn't be stumbling along at .9% average growth over the past 15-20 years. They've got all the cheap labor they could ever need, and all they want to do is get rid of it. Doesn't that tell you something about the economic worth of these workers?