Second, even in the areas where federal authorities may enact law, they may not use the states as instruments of federal governance. This anticommandeering limitation upon federal power is often overlooked, but the Supreme Court will enforce that principle in appropriate cases.
Using medical marijuana as a case study, I examine how the anti-commandeering principle protects the states’ prerogative to legalize activity that Congress bans. The federal government has banned marijuana outright, and for years federal officials have lobbied against local efforts to legalize medical use of the drug. However, an ever-growing number of states have adopted legalization measures. I explain why these state laws, and most related regulations, have not been—and cannot be—preempted by Congress. I also develop a new framework for analyzing the boundary between the proper exercise of federal supremacy and prohibited commandeering.
Although I focus on medical marijuana, the legal analysis applies to any issue pitting permissive state laws against restrictive federal regulations. Recent referenda in Colorado and Washington that legalize the recreational use of marijuana for adults will likely prompt federal officials to respond by touting the supremacy of the federal ban and challenging the constitutionality of state efforts at legalization. Such state reforms should carry the day in the event of such a legal challenge.
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Robert A. Mikos is professor of law and director of the Program in Law and Government at Vanderbilt University Law School.
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