Amazon.com has this cool website showing which sorts of political books people are buying in which states:
What struck me was the similarity of this to the “voting patterns of the rich” map from our book:
I wonder what data from Wal-Mart from Wal-Mart would look like. Maybe like one of the lower of the two maps? I’m not sure, though, since, even at Wal-Mart, buyers of political books are more politically active and thus maybe more like “rich people” in their red-blue divisions.