[quote=CognitiveDissonance]I could be wrong, but I’m pretty sure, as of the past few decades, most is grown stateside. California is like a $14 billion alone.[/quote]
I’m going off memory here, but as I recall something like 60% of the Mexican drug cartels’ revenue is from marijuana, but… only a small fraction of that actually goes to California, as Californians grow a lot of their own in-state (as you point out). The larger concern for the cartels with respect to California legalizing marijuana is that CA’s pot would get exported (illegally) to other states, which would have a material impact on the cartel’s drug sales.