The chart shows the results of the Focus on Rural America / David Binder Research Poll -- done on December 10th and 11th of 500 registered voters likely to attend the Iowa Democratic Caucus in 2020. The margin of error is 4.4 points.
The poll showed four possible candidates in double-digits -- Joe Biden (30%), Bernie Sanders (13%), Beto O'Rourke (11%), and Amy Klobuchar (10%). They were followed closely by Elizabeth Warren (9%), Kamala Harris (7%), and Cory Booker (6%). No one else got above 3%.
I found it interesting that the poll asked those who supported Sanders or Clinton in the 2016 caucus who they now support. If you thought the Bernie Sanders supporters (represented by the green bar on the chart) would all eagerly be in his camp again, you would be wrong. They are all over the place. Bernie could still win them back in the next few months, but right now only 30% of them support him.
