The US imposed and exported the idea (and the problem itself, by the US embassies in each country, for example training military the mexican narcos, exporting colombian narcos to the continent, etc) that the narco problem belongs basically to Latin America, -that is assinging a particular problem to the region, like insecurity- while they are the main destination and the number one consumer world wide (60% of the drug in the world goes to the US).
Of course there are not big narco maffias in the US, nor problems of any kind, nor growing problem. The image of dangerous narcos, of people making big money through drugs, is only a patrimony of the latins, and on the other hand you have the tidy sane honest americans that are victims of these narco people.