Apart from all the public safety dangers, the easily predictable increases in human- and drug-smuggling which would also arise make plain what a bad plan this was to begin with.
US guns are being used to allow some very bad Mexicans to shoot a lot of their countrymen. This isn't just a tragedy for Mexico: it's also a national security for the US -- one that we are causing.
Are those of us who seek changes in the American approach to drugs whistling in the dark, or is now the time to strike?
We now have a chance to bankrupt the Mexican cartels, the Taliban, the Bloods and the Crips, and the gangs that are shooting their way across world -- before they cause the collapse of two countries.
Since the overthrow of many of the drug lords in Colombia (with the assistance of the US), Mexico has become the gateway for drugs entering the States, the world's apparently biggest consumer of drugs.