http://www.citiesjournal.com/top-11-cities-with-the-most-democrats/
More than 80% of Americans now live in cities, suburbs, or towns. Of these, all but two of the cities with populations over 600,000 are primarily Democrat or nonpartisan. This reflects the focus of the Democratic Party on issues related to city living – public transportation, urban housing, health, education, employment, and other social issues that arise when masses of people live close. Here are the top 11 cities in the nation with the greatest number of Democratic voters.