"This conflict is only going to continue to grow over the next few years, and we must provide certainty to the millions of individuals and businesses that remain caught in a web of incompatible laws," he said. "A national commission would provide us with the information we need to create sensible policy going forward."

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The new commission would study how federal laws should be reconciled with state laws, the cost of the federal prohibition on marijuana, and how the federal government should place marijuana in the schedule of the Controlled Substances Act.

It would also examine the health impacts of marijuana, and racial disparities and other consequences related to marijuana possession.

Cohen noted that a national commission on marijuana use was set up in 1971, and it released a report in 1973 that called for the decriminalization of the drug.

"In the four decades since the Shafer Commission, however, the federal government has only expanded its War on Drugs and continued to prohibit the use marijuana," a statement from Cohen's office said.

Cohen's bill is cosponsored by Reps. Earl BlumenauerEarl BlumenauerKentucky Dem lawmaker questions Trump's mental health A guide to the committees: House Democrats raise questions about Trump’s mental health MORE (D-Ore.), Sam FarrSam FarrDEA decision against reclassifying marijuana ignores public opinion 19 House Democrats' sites hacked at close of gun sit-in Dems push for allowing base closures MORE (D-Calif.), Jim MoranJim MoranFormer reps: Increase support to Ukraine to deter Russia GOP Rep. Comstock holds on to Virginia House seat 10 races Democrats must win to take the House MORE (D-Va.), and Jared Polis (D-Colo.).