04/05/2012 12:14 pm ET

Why Colorado's Opinion Of Marijuana Is Subject To Frequent Change (AUDIO)

Three Colorado towns voted to ban the sale of medical marijuana in municipal elections this week. The move comes the same year proponents are seeking to legalize use of marijuana across the state.

As interest groups seek to both liberalize and add restrictions on the drug in Colorado, political scientists and pollsters are left with a puzzling task: pinpointing just exactly where public opinion stands.

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