Medical marijuana a challenge for legal pot states

Associated Press (US)
Friday, January 2, 2015

A year into the experiments with legal, taxed marijuana sales, Washington and Colorado find themselves wrestling not with the federal interference many feared, but with competition from medical marijuana or even outright black market sales. In Washington, the black market has exploded with scores of legally dubious medical dispensaries opening and some pot delivery services brazenly advertising that they sell outside the legal system. Licensed shops say taxes are so onerous that they can't compete.