If Mexico legalizes drugs, how does that affect the U.S.?

Apparently Mexico is taking a hard look at drug legalization, hoping that will put an end to all the drug-cartel-related violence, murder and corruption in Mexico. Well and good, but most drugs now illegal in the U.S. almost certainly will remain illegal for some time to come, and will remain in demand, and drug smuggling from or through Mexico will continue, with all the violence, murder and corruption attendant on that – so how, if at all, would this affect the U.S.?

Maybe marijuana will be legalized here in the next decade – but that’s only marginal to the cross-border trafficking problem, since it is a drug that can be (and is) grown in large quantities in the U.S. Cocaine, OTOH, can be grown only in South America.

I would predict a huge increase in travel to Mexico.

See also previous thread.