WASHINGTON (Reuters) - The federal government has the power to prevent sick patients from smoking home-grown marijuana that a doctor recommended to relieve chronic pain, a divided U.S. Supreme Court ruled on Monday in a setback for the medical marijuana movement.The 6-3 ruling means the federal government can enforce a federal law prohibiting the cultivation, possession and use of medical marijuana even where it is legal under state law. At least nine states allow medical use of marijuana.
