Good for the big American factory farms, anyway.
Because despite all those hard-working Mexicans down in Mexico, giant American factory farms turn-out food cheaper than Mexican farms can.
Google it up: http://www.google.com/
This year it depends upon which crop and where it was to be harvested.
Not even efficient American commercial farms can do much when the weather is against them, except to import product from their other slave . . . er . . . large commercial farms around the world.
If I were one of them big Mexican farmers, I'd be dumping crops on this side of the border every chance I got. Make it as costly as possible for those Yankee bandits to drive me out of my own markets--as they might well do under NAFTA.