The food industry can do the same thing and the Mexican Government will welcome them.
No doubt you're correct that more and more of the food industry will move south. It makes sense on several levels. They have the labor already and can produce the off season produce due to their latitude.
GOP's love of free trade cost us in November. Whether you agree with free trade or not (I don't) it is rapidl falling out of favor with voters.
http://online.wsj.com/public/article/SB116321182770520568-YgmqKBgqd0_Sw5C3Hd5FC0NQvto_20061210.html?mod=tff_main_tff_top
http://www.opinionjournal.com/columnists/pdupont/?id=110009282