the Mexican cartels do the trafficking since They basically control most of the distribution and wholesaling in the U.S and parts of Canada. They aren't just suppliers. Many gangs are linked to the cartels and some do hits for them. So they do have power on the streets via intimidation, kidnapping, murder or torture.
i don't think they control most of the distribution and wholesaling, in same southern areas maybe, in the rest it's mostly run by local gangs, mostly black and latinos... intimidation, kidnapping and murders are mostly carried out in mexico, not the states
