Medical marijuana advocates are hoping state governments can succeed where their efforts have failed by asking federal authorities to reclassify pot as a drug with medical use. Recently, Colorado became the fourth state to ask the U.S. Drug Enforcement Administration to reclassify marijuana as a narcotic in the same league as heavyweight painkillers including oxycodone. The governors of Washington and Rhode Island filed a formal petition with the agency in November, and Vermont signed onto that request shortly afterward.