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.

I realize no such thing. Do you have any numbers?

The problem with bringing in Mexican workers legally is that Big Agriculture doesn't want legal workers. Legal workers have to be paid living wage and work in OSHA-approved conditions. And Big Agriculture doesn't want that. Neither do we, really, because it means we'd have to pay more for our produce, and we'd scream bloody murder if we had to do that. Already if you suggest that Wal*Mart stop exploiting its workers and suppliers, people (usually on the right) cry out, "Don't you WANT people to be able to buy cheap groceries and clothes?" Usually the same people that despise illegal immigrants.

Some people are just TOO hard to please.