I think people are missing something pretty important here: this creates justification to use the US military against its citizens. Sure, it may just be to justify an invasion of Venezuela, but I suspect it's more substantial than that. Saying the cartels have WMDs within the United States manufactures a threat that the military needs to fight. These "WMDs" are in every state and every city. They have manufactured a credible reason to use the military anywhere in the US against any group of people because it's so pervasive.