One of the biggest arguments made by cannabis advocates when trying to sell their spiel to politicians and voters was that legal weed would eliminate the black market. This, they said, would make it more difficult for children to get their hands on pot than in decades past while also generating significant tax revenue for the states. But the underground pot trade hasn’t really gone anywhere. In fact, it is only growing stronger now that criminal organizations have the luxury of being domestically based instead of running distribution from Mexico.