«One obvious question you might have before we proceed further: Why aren’t women one of the groups? The answer is that women represent almost 60 percent of the Democratic primary electorate3 and so they’re a major portion of all of these groups. In fact, women are likely the majority of all of these groups, with the possible exception of The Left, which skews male. So when you think of a default voter from one of these groups, you should probably think of a woman.»
(I haven’t read the details of each group.)