There you have it in the last paragraph above. The mafia got control
No, they got control of "a substantial portion" - how "substantial" is not reported.
and so it is certainly likely that you will be handing contol to the Drug Lords, the Columbian Cartels who have been terrorizing Mexico.
Putting aside whether nonresident noncitizens will be able to invest in these legal businesses, at most they'd own a "substantial" (whatever that means) share of the distribution business - no room there for "lacing with addictive additives," any more than alcohol distibutors do now.
And if cartels are able and eager to invest in legal US businesses, why haven't they done so already?
Who says they don't? They are mafia, they own and operate banks, politicians, resorts, casinos, prostitutions rings, extortion rackets.
If you were to meet a Cartel kingpin in Mexico City (that is where they live) you would find they look very nicely dressed, they live in very nice gated communities with their families, their children look very nice and go to the best schools, they go to Church (Catholic). They look and act as respectable businessmen.
They own many things around the world including in the USA. They have ties to Universal Studios in LA and many hotels in Miami.
And when you let them in to set up legal pot distribution, they and their lietenants will become permanent residents in a city near you, and proceed to finance political campaigns that will disarm you and ensure you are not threat to them. In fact they want to hold threats away from you and make you pay them 'insurance' to protect you. And if you don't pay, then you will be in danger.
That is the nature of the real enemy.
Is McCain a RINO? You bet he is. Does he talk a good conservative game? Yeah, he can fool a lot of people a lot of the time. Who does he take orders from? The people that are behind his wife's inherited liquor empire. But those people are nothing next to the brutal terror of what is behind the drug trade. And what is behind the drug trade hates the USA.