I expect the corn will go where it fetches the most money. If American drivers are willing to pay more than the average Mexican peasant is willing (or able) to pay, then it will come Norte. No bureaucratic bungling necessary.

Of course, there are things that we can do to mitigate the consequences:

  • American taxpayers could subsidize Mexican corn growers like they are subsidizing American corn growers.
  • We could put up a big fence to keep hungry Mexicans from...(oh, yeah, we're already doing that).
  • We could nuke those pesky Mexicans.
  • We could teach the Mexicans to root for truffles.
  • Have I forgotten anything???

    Yes, the obvious thing: the Mexicans can grow more corn and be a part of the bonanza. This will lower the price of corn and then Juan and Maria can afford their tortillas again. Bonus points if Juan and Maria invest in corn or ethanol-related companies.