In 2012, the people of Colorado voted to legalize marijuana through a state constitutional amendment, which went into effect in January of 2014. Two of Colorado’s neighbors, Nebraska and Oklahoma, subsequently filed a lawsuit urging the U.S. Supreme Court to prohibit the state of Colorado from constructing a regulatory regime for the marijuana industry. Last Friday, Colorado filed its response.


The Nebraska/​Oklahoma argument: because the federal government, through the Controlled Substances Act, has banned marijuana, states are not allowed to contradict that ban by creating a regulatory framework for legalization. Further, Colorado’s official regulation of recreational marijuana imposes a nuisance burden on surrounding states due to an alleged increase in drug trafficking. While Nebraska and Oklahoma disclaim any intent to force Colorado to “re-criminalize” marijuana, the suit argues that Colorado’s official efforts to regulate the legal marijuana industry bring the state into conflict with federal and international drug laws.


Colorado’s response: there is no conflict. Federal marijuana prohibition is still in effect, and the decision not to prioritize enforcement in states that legalize marijuana came from the federal government, not Colorado. If Nebraska and Oklahoma object to the manner in which the federal government is discharging its law enforcement duties in Colorado, they should be suing the federal government. Colorado’s regulation of the marijuana industry is within its prerogatives under the CSA. As to the nuisance claim, Colorado argues that mere policy differences between states that don’t directly injure the sovereignty of other states are not actionable nuisances.


The legal basis for the lawsuit has been questionable from the beginning, with legal commentators both challenging its merits and pointing out the irony in two of America’s “reddest” states taking a legal posture that overruns state sovereignty in favor of federal power.


And, of course, if prohibition states are concerned with the costs, they could always legalize and regulate marijuana themselves and spare their justice systems the immense costs of prohibition.


While some notable conservatives appear to be coming around in favor of a federalist experiment on drug legalization, it is a testament to the unfortunate power of the drug war that two state governments that routinely invoke the merits of federalism would abandon it in favor of federal prohibition. As discussed previously, federalism would hardly be the only cherished principle to be left in the drug war’s wake.