Marijuana: Could Maine pot measure push East Coast states toward legalization?

Colorado's Proposition AA, a marijuana-taxation measure, isn't the only high-profile pot issue being considered this election day. For instance, Portland, Maine residents will weigh in on Question 1, which removes penalties for possession of up to two and a half ounces of weed.

If the proposal is approved, Portland will become the first East Coast city to move toward legalization. Could it lead to Maine and other states following suit? One advocate sees a familiar pattern.