Like many states, Illinois is in deep financial trouble. Looking at the latest audit, its black hole has deepened to $9.6bn (£7.6bn) and, according to the state’s financial comptroller, the books are “abysmal”.

But there could be salvation at hand if it becomes the first state in the midwest to legalise and tax the recreational use of marijuana. Two Democrats in the state legislature have introduced a bill to change the law, arguing this could raise as much as $700m a year.

Should the bill go through, it would bring the number of states where recreational pot is legal up to nine. If you throw in Washington DC, then more than 80m Americans would be free to enjoy cannabis.

With Canada, which has a population of nearly 36m, about to follow suit, the potential market for recreational pot users across north America is poised to crash through the 100m barrier.