Will this be more or less controversial than its immigration reform? By a margin of a little more than 4,000 votes, Arizona became the 15th state to legalize marijuana for medical purposes. Under Proposition 203, people suffering from cancer, HIV-AIDS, Hepatitis C, or any other “chronic or debilitating disease” can purchase up to 2.5 ounces of pot every two weeks—or even grow their own. The measure looked like a loser in the initial vote count after last week’s election, but as ballots came in from Phoenix and its environs, the votes for approval took a slim lead. Arizona's governor Jan Brewer, its attorney general, and every one of its sheriffs and county prosecutors opposed the measure.