California has been a pioneer in the regulation of marijuana. In 1913, California was one of the first States to prohibit the sale and possession of marijuana, and at the end of the century, California became the first State to authorize limited use of the drug for medicinal purposes. In 1996, California voters passed Proposition 215, now codified as the Compassionate Use Act of 1996. After federal Drug Enforcement Administration (DEA) agents seized and destroyed all six of Monson's cannabis plants, respondents brought this action seeking injunctive and declaratory ...