The president's decision removes a threat placed by his own attorney general just three months ago.
The pendulum has always swung back and forth on public policy around making marijuana legal.
Methamphetamine was found in the systems of 280 Coloradans who died of overdoses in 2017, a number up sharply from the year before.
CDOT is holding town hall-style "cannabis conversation" to wrap its head around marijuana’s effect on drivers.
The legal weed industry is growing at its lowest rate since recreational stores opened four years ago.
People have not been coming to Colorado, "spending their last dime on cannabis and then lining up at soup kitchen queues" one of the study's authors says.
“Let's take the step of allowing marijuana to be available to researchers,” the congressman said.
While Congressman Lamborn is no fan of marijuana, he now says he supports studying the potential medicinal qualities of it.
Genetic coding, isotopes and Bitcoin-like databases may be used to keep tabs on the origins of marijuana and other cannabis products.
The owners plan to charge an entry fee to the bring-your-own space where people can vape or consume edible pot products.