Why would you make such an absurd claim?
The U.S. is a net exporter of pork. Nearly 80% of our exports go TO mexico. Of the little imported pork that comes into the U.S., Canada and Denmark account for nearly all of it.
Most of the pork in the US comes out of mexico? Simply absurd.
Thwere are huge US owned pig farms right outside of Mexico City.
I read this wrong: "Mexico is the second biggest export market for U.S. pork."
http://www.thepigsite.com/articles/2/ai-genetics-reproduction/1857/world-pig-production-opportunity-or-threat