The two ladies in question both teach Feminist Jurisprudence at law schools, and have no scientific pre-law background, having attended the same PR and IA school for their bachelors of art, they've no science or math background, social or natural. I recognize the data they are using, its ACS data from the Census Bureau, Pew did an analysis of it sometime back, needless to say they didn't draw the same conclusions, but then they didn't deliberately leave out the most blue least liberal demographic of the Dems, African-Americans, in their analysis, which has been a source of a lot of criticism on the book.

AA aren't particularly liberal, no, almost all blue though, red v blue state doesn't measure lib/con tendency. As is often pointed out, all that is indicated by Red v Blue is what percentage of the population of the state is urban.