Yesterday, Congressman Steven Cohen (D-Tenn.) did a fantastic job of arguing against two common and misinformed prohibitionist arguments during a congressional hearing with FBI Director Robert Mueller.

Watch the video below to see Congressman Cohen refute the arguments that marijuana is particularly harmful and that marijuana is a gateway drug.

An Arizona family describes why they support the need for a medical marijuana law.

Sen. Tom Coburn (R-Okla.) introduced legislation in the U.S. Senate today that sought to undermine the 13 state medical marijuana laws. Coburn’s legislation was defeated in committee (13-10) on a party-line vote.

Offered as an amendment to the Family Smoking and Tobacco Control Act, Coburn’s legislation would have placed state medical marijuana laws under the regulatory control of the FDA – not necessarily a bad thing on its own. But Coburn's intentions become apparent when you realize that FDA approval requires specific, FDA-approved research into marijuana’s risks and benefits as a medicine, something the federal government has blocked for decades. Without the research, MPP feared that the FDA would shut down medical marijuana access nationwide.

The fact that medical marijuana opponents are going on the offensive (and failing) speaks volumes to the success we’ve had in recent months.  The Supreme Court recently affirmed California’s medical marijuana law, and the new administration has stated a policy of non-interference with state medical marijuana laws – and both points were raised during the committee debate. Even Sen. Coburn conceded, “It is not an illegal product in 13 states.”

It is possible that Sen. Coburn will continue his attack on medical marijuana, but given the opposition he faced today, it's unlikely he'll succeed.

MPP Director of Government Relations Aaron Houston discusses the contradictions between State and Federal law regarding the use of marijuana. Specifically, he addresses the U.S. Supreme Court decision not to review a challenge to California medical marijuana law brought by two counties in that state. The counties had been defeated in lower court decisions that affirmed the right of States to make laws that violated Federal law. 05/19/2009

Tim Pawlenty, Minnesota's Republican governor (pictured below), has "great empathy for the sick." I know it's true because he said so.

He just thinks they belong in jail if they need medical marijuana.

He announced his intention to veto the medical marijuana bill at his news conference today. Then, amazingly, he went on to wax rhapsodic about how "The sky is blue, the sun is out. The minds of Minnesotans are turning to Memorial Day, summer, fishing."

Tell that to Joni Whiting, whose daughter Stephanie gained some comfort and the ability to eat from medical marijuana during the last months of her doomed struggle with melanoma. Pawlenty thinks it's just fine to treat Joni, Stephanie, and others in that dreadful situation as common criminals.

Bear in mind that the bill the governor says he'll veto is so drastically narrowed down that none of the purported concerns of law enforcement, whose direction he's supposedly been taking, have even a shred of validity. As passed, it would only have covered terminally ill patients, and even they wouldn't have been allowed to grow their own marijuana.

Pawlenty reportedly has national ambitions. Maybe he thinks there's a large block of voters out there who think cancer patients belong in jail. Or maybe he's just heartless. In any case, you can count on talk of a 2010 constitutional amendment -- which would bypass the governor -- to get a lot more serious.

The latest news from Minnesota is a classic good news/bad news situation. The good news is that the state House of Representatives passed a medical marijuana bill, which is now on its way to the desk of Republican Governor Tim Pawlenty. This is the first time that a state legislature in the Midwest has ever passed a modern, effective medical marijuana bill.

The bad news is that before passing the bill, they watered it down seriously.

There are honest disagreements about this issue, but parts of the debate were just frivolous -- as when one member proposed an amendment to change the word "marijuana" in the bill to "pot." Really. I am not making this up.

That amendment failed, but the final version took out the ability of patients to grow their own medicine and limited the bill's protection to patients who are terminally ill. That leaves out an awful lot of patients who deserve protection, including K.K. Forss, whom I met last year while making presentations to newspaper editorial boards about the bill.

Politically, the legislature's action puts the governor in an interesting spot. He has previously signaled opposition, basically siding with law enforcement officials who claimed that the bill would be open to rampant abuse and would flood the state with marijuana. Those claims were always dubious, but with the bill so drastically narrowed, they're now downright ridiculous.

We hope the governor signs the bill, imperfect as it is. With a two-year sunset clause, there's a built-in opportunity to improve it in 2011. And the track record of improving flawed medical marijuana laws in other states is pretty good. Vermont, for example, passed a highly restricted medical marijuana law in 2004 and then broadened it significantly three years later, boosting the amount of marijuana patients may possess and increasing the number of medical conditions covered.

On the other hand, if the governor vetoes, there is a distinct possibility of placing a constitutional amendment on the 2010 ballot. That won't be easy, but it's possible.

Either way, K.K., we're not giving up.

California's medical marijuana laws just received their latest legal vindication today - this time at the nation's highest court. The U.S. Supreme Court announced that it will not be hearing a case lodged by the counties of San Diego and San Bernardino aimed at gutting California's medical marijuana law. The two counties claimed that the federal law banning all marijuana trumped the state's medical marijuana law.

The challenge was initially filed in 2006 at the San Diego County superior court after the counties had refused to implement the state-mandated medical marijuana identification card program. The superior court judge sided with patients and state law and strongly denied the counties' claim. Last year, a state appeals court also ruled against the counties, and the state Supreme Court refused to hear their appeal.

The protracted legal battle has been a popular excuse among California officials trying to shirk their legal obligation to uphold the state's medical marijuana laws. Now that the U.S. Supreme Court has decided against hearing the case, officials in San Diego, San Bernardino, and seven other counties not following the law have nowhere to go but to obey the will of the voters who overwhelmingly support medical marijuana laws.

Beyond California, the message should now be clear that hiding behind federal law is no longer a legitimate position to take when considering state-level medical marijuana laws.

On Thursday night's edition of "Anderson Cooper 360," former drug czar John Walters and I were interviewed separately about a new government report claiming an increase in average potency of marijuana seized by law enforcement (we'll have a video link posted soon). I pointed out an obvious fact: When the marijuana is more potent, users smoke less, just as people typically drink a much smaller quantity of bourbon than of beer. Thus, higher-potency marijuana doesn't necessarily mean users take in more THC. And, given that the most significant health issue connected to marijuana is the respiratory harm from smoke, smoking less to get the same effect is clearly healthier.

Asked about this, Walters said flatly, "There is no evidence of that."

He lied. I know this won't be a huge shock to faithful readers of this blog, but I think it's worth putting the facts on the record.

In a study titled "Vaporization as a Smokeless Cannabis Delivery System: A Pilot Study," published in May 2007 by the journal Clinical Pharmacology and Therapeutics, University of California researchers looked at smoking and vaporization using marijuana of 1.7%, 3.4% and 6.8% THC. Because the idea of the study was to compare smoking and vaporization, participants were guided through a standardized puff procedure.

Although the high-strength marijuana was four times as potent as the weakest, it produced a peak plasma THC level only about 20% higher, smoked or vaporized. This, the researchers wrote, suggests that either less is absorbed at the higher potency levels or  there is "self-titration of THC intake," meaning that "smokers adapt their smoking behavior to obtain desired levels of THC." Among the evidence for self-titration, researchers found that their subjects tended "to take more puffs at lower THC concentrations" -- despite having been given a fairly regimented smoking procedure to follow. Similarly, the subjective "high" reported by participants was only modestly more intense at 6.8% THC than at 1.7%.

Prohibitionists are entitled to their own opinions. They aren't entitled to invent their own facts.

One final note: I was disappointed that perhaps the most important thing I said to the interviewer didn't get on the air. If potency is a concern, there is an obvious solution: Regulate marijuana as we do alcoholic beverages, and require the cannabinoid levels to be listed on the label. If consumers know what they're getting -- as they do now with beer, wine, or Bacardi 151 -- they can adjust their behavior to avoid unpleasant surprises.

MPP's Bruce Mirken responds to claims that the marijuana available today is far stronger than it has ever been, asserting that these claims are made to promote needless fear and are not harmful even if true. Also featured is John Walters, prohibitionist and ex-Drug Czar under G.W. Bush. 05/14/2009

MPP's Bruce Mirken will appear on CNN's "Anderson Cooper 360" tonight to add a little rationality to the latest pronouncement regarding rising THC levels in marijuana from the National Institute on Drug Abuse-funded Marijuana Potency Project.

Drug warriors love to exaggerate small increases in marijuana potency over time and make vague proclamations linking those increases to increases in marijuana's potential danger, even though no credible research supports such a connection. Of course, if they were truly concerned about the potential danger of higher potency marijuana, then they should favor regulating the drug and requiring manufacturers to label the product's potency, just as we do with alcohol.

The show is scheduled to air tonight at 10 p.m. EST, but the hysteria surrounding one of the drug warriors' favorite imaginary fears is sure to last much longer.