As someone that travels a lot I was interested to read the above list. The two cities that surprised me the most on this list, as I have been to both, are Tulsa, for being as conservative as it is, and Washington D.C, for being listed as more liberal than a place like Seattle. Although Oklahoma is no doubt conservative, Tulsa is the one place I have been to in that state that feels like it bucks that trend. Also having witnessed the cultures of both D.C. and Seattle, I was surprised, as the above article suggested, that D.C. was listed higher as Seattle. The above link provides a link, the list, and pictures over at Forbes. The Economist is actually who devised the list and their research is here.