An interesting read. It seems to me that the author is examining a system where the drugs are legally produced inside a US state where the drug is legalised, and then illegally smuggled across state borders to those states where it is not.
I see a couple of problems with this. The entire scheme rests on criminal enterprise to set up a distribution network inside the US. Which is, you know, criminal. And likely handled by organised crime. I assume (could be wrong here) that the production of drugs in the states mentioned in the article would be heavily regulated, with any evidence of collusion with smugglind rings, the mafia, or other such illegal organisations resulting in an investigation with the producers prosecuted and their operations shut down. So even if the production is legal, how would you get the producers together with the national distributors (who are operating illegally) while avoiding a law enforcement crackdown?
And then there would be the pressure levied against state lawmakers by their neighbouring states, the DEA, FBI, and other organisations that have a problem with drug smuggling and it's enablers.
I only have the above article to go on, but the entire idea seems difficult to make work the way the author suggests, assuming I understood his point correctly.