WASHINGTON -- The current and previous presidents of the United States used marijuana. So has presumptive Democratic nominee John Kerry. California Gov. Arnold Schwarzenegger has admitted to drug use. Conservative radio talk-show host Rush Limbaugh, who once beat the drums for jailing white junkies, has been through drug treatment.

Some 75,000 Californians now use marijuana under a doctor's care. The U.S. Supreme Court let stand an appellate court ruling barring Uncle Sam from punishing doctors who prescribe medical marijuana under state law.

A federal district court in California has allowed defendants to introduce evidence that they were growing marijuana for medical purposes. San Francisco is considering creating nonprofit marijuana cooperatives.