Blue city, red country

"In red states, urbanites tended to vote blue, whereas in blue states, ruralites tended to vote red."

I know he goes on a bit, and he's trying to hard to make it interesting when it already is, but Daniel Herman writing at History News Network has a good reminder that it's not red states and blue states, it's cities and the countryside -- and they've switched colors in the last 120 years. There's something going on here that is neither right nor left.