One of the biggest obstacles is the fact that drug revenues from the cartels bring in about $14B (2005 numbers) from the US alone. For comparison, Mexican oil exports brought in $36B.
(I'll search and provide a link if anyone wants those numbers confirmed)
8 posted on 10/24/2011 5:37:24 AM PDT by Ken H
(They are running out of other people's money.
)