The Des Moines register poll asked caucusgoers what party they were in. 5 say democrats and 3 independents. They can vote as long as they register as republicans at the caucus site. This is not an insignificant amount. Where are they in iowa . To figure that out, lets go to the counties in iowa. Joe biden, the democrat. He won six of them. But they are populous counties. They include where Des Moines is. They include University Towns like ames where Iowa State is, iowa city, where the University Of Iowa is. These have the highest level of education, by and large, these counties do. I can put up this filter right here. And you can see, the darker areas have the greatest percentage of noncollege educated voters. Lighter, college educated. You can see, all these light