"The real issue here is: when do you have enough people? I think we have too many already..." ~ Rigs

Well, Arizona has 28% Indian lands and 48% Federal lands, such as National Forests and BLM property. That's 76% that the new Mexican population cannot live on, at least legally. Add some more land owned by the state of Arizona and you realize that the state is actually much closer to its carrying capacity that one might assume.

"Several states are writing similar legislation at this moment." ~ Rigs

Last time I heard it was 17 states. The puny, over-represented northeastern states like Vermont, Rhode Island and Delaware will, of course, not join the fight.