>Most cities are blue—of the major cities (100,000+), only Salt Lake, Fort Worth, and Oklahoma City rejected Obama substantially in 2012, and Phoenix is the only one that he lost narrowly. Cities, almost by definition, are blue.
Don’t forget Jacksonville FL. (Pop 900,000).
While the county that Jacksonville is in did go for Romney, it did so only by 15,000 votes, so I’d bet that the city itself went for Zero, and that the article that I was drawing on, which focused on cities rather than metropolitan areas, was accurate. Burbs tend to be more Republican than the cities they surround, and the countryside even more so.