Debra J. Saunders

President Barack Obama has become quite the drug warrior.

Last month, his Bureau of Alcohol, Tobacco Firearms and Explosives issued a memo that stated that it is unlawful for anyone with a state-issued medical marijuana card to possess a gun or ammunition. This month, four U.S. attorneys in California announced that they are escalating prosecution of medical marijuana clubs by going after the assets of their landlords and property owners.

As a senator and presidential candidate, Obama supported states' rights on medical marijuana. In 2008, campaign spokesman Ben LaBolt told me Obama "believes that states and local governments are best-positioned to strike the balance between making sure that these policies are not abused for recreational drug use and making sure that doctors and their patients can safely access pain relief."

When he was first in office, it looked as if Obama would do as he had said. Drug war opponents were pleasantly surprised in 2009 when a Department of Justice memo advised U.S. attorneys not to "focus federal resources" on "individuals with cancer or other serious illnesses who use marijuana as part of a recommended treatment regimen" consistent with state law or their caregivers.

But this year -- charges Ethan Nadelmann, executive director of the anti-drug war Drug Policy Alliance -- Obama seems controlled by "over-zealous prosecutors and anti-marijuana ideologues."

Now, I believe marijuana should be legal -- and not simply for medical use. But I also recognize that federal law trumps state law. Many marijuana suppliers hide behind the mantle of palliative care to profit from recreational use and abuse. It must drive prosecutors nuts to watch what are basically criminal enterprises cash in by taking legal cover under state law while flouting federal law. Washington could remedy that by legalizing marijuana.

But when U.S. attorneys in California send out dozens of letters threatening landowners and lien holders with the seizure of their property and assets, they're not going after the drug trade. They are using the full force of the federal government to threaten people whose crime is renting, not breaking federal criminal law. Make that renting to businesses allowed under state law.

"Although our initial efforts in the Northern District focus on only certain marijuana stores," Melinda Haag, the U.S. attorney in San Francisco, explained in a statement, "we will almost certainly be taking action against others. None are immune from action by the federal government."

Debra J. Saunders

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