Proposition 64 would not change the fact that marijuana is still illegal under federal law, and that is a serious complicating factor. Growers, sellers and even consumers are at risk if a new administration in Washington suddenly decides to enforce federal law. Is that likely to happen? Four states have already legalized recreational use and five more, including California, are voting on legalization in November, and 25 states allow medical marijuana. By choosing not to stop the states, President Obama and Congress have essentially permitted more liberal marijuana laws. At the same time, however, they have been unwilling to amend federal law to make clear what is and isn't allowed. In fact, the Drug Enforcement Agency decided last month to maintain marijuana's status as a Schedule 1 drug, meaning it is as addictive as heroin and has no medical value, despite the fact that half the states in the nation permit medicinal use.