When/if the SHTF those living in the southwest will most likely have a much worse problem than those in other states. I believe we will see a huge horde of people come up from Mexico. The lure of no police and free looting in the rich USA will be quite an enticement. And that is for the regular population of Mexicans. If I was running a drug cartel I would realize that until things got back to normal I would be out of business. The best option would be to send groups of my "troops" up to the USA to pillage. Even if functioning our government would take a long time to make a decision to secure our border. Those of us living in the southwest would be screwed. Well at least we wouldn't have time to fight amongst ourselves(I hope) but instead band together to fight the invasion. Or have I got it all wrong?