They would be able to do whatever they liked, and the U.S. would really only be giving up copper deposits. Considering what would need to be shipped in to the country of Arizona, the U.S. could have a strikingly awesome trade advantage to get the copper cheap.
The immigration bill is racial profiling in the purest form. We've had this argument many times in other threads. It also happens to be in direct defiance of the 14th Amendment.
Then you got House Bill 2524 which bans ethnic studies in High Schools.
How about all the surviving KKK, local militias, and other white supremacy organizations that have found safe haven in Arizona? One of the few places I can think of where a sheriff can outright say he's proud to be a KKK member without losing his job. Good for them. I'm glad they have a place to go.
Cause they passed a law saying a cop can ask anyone for proof of citizen ship probably. Next day the hispanic areas were all ghost towns which should be a huge indicator of how large the problem is right there....