U.S. officials are trying to stop the violence from crossing the border. The Obama administration committed to spending an additional $700 million to help Mexico fight the cartels and agreed to double the number of U.S. agents working the border.
Violence "threatens" to cross the border?!? I don't know quite what planet this particular writer lives on, but it cannot possibly be earth.
Drug-related crime has been expanding exponentially for the last years in the border areas.
Of course, there's one thing the US could do to make this go away, and very quickly. That would be complete decriminalization of drugs, just pulling the plug out of the profit motive. You'd see addiction plummet.
But, of course, that would be logical. And too many people at too many levels of government and commerce are making too much money to have this happen.