Mealey's (May 18, 2022, 8:51 PM EDT) -- WASHINGTON, D.C. — Petitions by employees seeking a decision on whether the Controlled Substances Act (CSA) preempts rulings under a Minnesota workers’ compensation law requiring an employer to reimburse costs for medical marijuana being used to treat a work-related injury should be denied by the U.S. Supreme Court because “when a federal law such as the CSA prohibits possession of a particular item, it preempts a state law requiring a private party to subsidize the purchase of that item,” the United States argues in a May 16 amicus curiae brief....