Legalization measures have already qualified for the 2012 November ballot in Washington State and Colorado, and a similar measure in Oregon is likely to qualify. But California, which led the way with the failed Prop. 19, has no legalization measures pending, according to Paul Armentano, deputy director of NORML California.

Rick Wilking/REUTERS
Mason Tvert (l.) and Brian Vicente, leaders of a campaign for legal marijuana, pose in their offices in Denver.