Four groups have asked federal officials to reclassify marijuana . They say they ca n't set rules without risking violations of U.S. law . Advocates say there 's no reason to keep paying medical marijuana providers . Critics call medical marijuana a ` ` Trojan horse '' for legalization .
Four states have asked federal officials to reclassify marijuana . Governors say they ca n't set rules without risking violations of U.S. law . Advocates say there 's no reason to keep busting medical pot providers . Critics call medical marijuana a `` Trojan horse '' for legalization .