Democratic presidential hopeful Martin O'Malley is meeting with the marijuana industry in Colorado as he promotes his plan to see the federal government soften its prohibition on the drug.
O'Malley scheduled a meeting with several people in the new pot industry, along with state regulators.
The former Maryland governor has said the federal government should reclassify marijuana as a controlled substance.
Such a reclassification could open the door to doctors being able to prescribe marijuana, which currently has no legal medical use under federal law.
Last year O'Malley signed a Maryland law decriminalizing small amounts of pot.
Many drug-policy activists have long complained that marijuana is improperly classified in the same drug category as heroin. But it's unclear how reclassifying marijuana under federal law would affect state-level marijuana businesses.