Tvert, an A64 proponent who's just taken on the new job of communications director for the Marijuana Policy Project, feels the amendment's passage "certainly played a role" in the poll results. "The more people hear about others who support ending marijuana prohibition, the more likely they are to be supportive as well. I think one of the most significant impacts of both the Colorado and Washington initiatives passing is the comprehensive public dialogue they've fostered."

In addition, individuals were quizzed about whether "President Obama should allow Colorado and Washington to implement" their marijuana laws, or if he should "use federal resources to prevent these laws from taking effect." The breakdown: 47 percent said Obama should not interfere, while 33 percent thought he should, with a sizable 20 percent expressing uncertainty.

Just as intriguing, in Tvert's view, is the way folks answered a broader query: "Do you think marijuana will be legal under federal law within the next 10 years, or not?" The affirmative reply tallied 50 percent, with 37 percent saying it would remain against the law and 12 percent saying they're not sure.

Tvert's interpretation? "Now, 50 percent of Americans, and a majority of people polled, say they believe marijuana will be legal at the federal level within ten years. I don't know what they would have said if they'd been asked prior to these initiatives passing, but I think they likely helped -- and so did the progress we've seen with medical marijuana in Colorado and around the nation.

"The fact that legislatures throughout the country have been taking up marijuana issues, and citizens have been raising them through ballot initiatives in a number of states, demonstrates that there's a significant and increasingly successful movement for ending marijuana prohibition and replacing it with more sensible policies."

How does Tvert feel about the business groups, including several chambers of commerce, calling on the feds to get tough with Colorado over Amendment 64?