Who leads among…?
very liberal: Sanders
somewhat liberal: Clinton
moderate: Clinton
men: Sanders
women: Clinton
college degree: Clinton
no college degree: Sanders
age 18-34: Sanders
age 35-49: Sanders
age 50-64: Clinton
age 65+: Clinton
<$30k income: Sanders
$30-50k income: Clinton/Sanders tie
$50-100k income: Clinton
>$100k income: Clinton
I wonder if you correct for age, whether Sanders is winning with lower income voters. One would have thought Hillary would be stronger with lower income whites than higher income whites. In states with more persons of color, I would assume that would explain Hillary's numbers, but not in Iowa.