The chart above reflects the results of the latest NBC News / Wall Street Journal Poll -- done between December 14th and 17th of a national sample of 410 likely Democratic primary voters, with a 4.85 point margin of error.
The chart above reflects the results of the latest CNN / SSRS Poll -- done between December 12th and 15th of a national sample of 408 registered Democrats and Leaners, with a 5.8 point margin of error.