Attorney General Eric Holder’s announcement that the federal government will end raids on medical marijuana distributors is terrific news.

The Bush administration’s scorched-earth approach to the enforcement of federal marijuana laws was a grotesque misallocation of law enforcement resources. The U.S. government has a limited number of law enforcement personnel, and when a unit is assigned to conduct surveillance on a California hospice, that unit is necessarily neglecting leads in other cases that possibly involve more violent criminal elements.

This shift in policy is also more mindful of the constitutional principle of federalism by allowing the states to try different policy approaches, and it is more respectful of the division of opinion within the medical community about the benefits of marijuana for certain patients. This de-escalation of the drug war is good policy and is long overdue.