Yeah I just read some ( admittedly dated ) information about Nigerian traffickers operating in Chicago from the DEA , not to mention that Chicago has a lot of ( if not the largest amount ) of fairly sophisticated/well connected street gangs , so using it as an example wasn't the best .

That said I bet there are many second and third tier cities in the US where the Mexican cartels are the only game in town , so I think my point stands in that case .