The Brookings Institution used 2012 Census data to determine the most income unequal cities in America -- and their study found that from LA to Atlanta, cities with liberal governments are also the ones with the largest divide between the poor and the rich. Alan Barube, the report's author, found that cities with vast income differences will have issues with education, job creation and middle class families leaving. He also points out that with President Obama and other Democrats pushing the agenda of an increased minimum wage and President Obama directly addressing income inequality, these statistics could have a political impact.
Los Angeles is one of the top 10 cities in America for income inequality, with the top 5% earning 12 times more than the bottom 20% of residents. New York City (which has largely been governed by liberals, with the exception of former Mayor Rudy Giuliani), Oakland (known for its high crime rates), Washington (which has had issues with bad public education and strict gun laws), and Chicago (run by the Daleys and then Rahm Emanuel) ranked alongside LA.
The data shows that the income disparity is even greater in San Francisco, Atlanta, Boston and Miami. Miami, FL has had a mix of Republican and Democratic mayors -- but San Francisco, Atlanta and Boston have historically had Democrats at the helm.
San Francisco's minimum wage is already $3.49 higher than the national minimum wage. Additionally, San Francisco's mayor, Edwin Lee, attended the State of the Union and afterward released a statement saying,
I look forward to supporting the President's goals in San Francisco by doubling down on an aggressive affordability agenda to build 30,000 new homes by 2020, raise the minimum wage and create and sustain good jobs for all San Franciscans.
Both Atlanta and Boston have been run by Democratic mayors for the last 40+ years. In Boston, Democratic mayors have dominated. Atlanta's Mayor Kasim Reed was endorsed by President Obama who praised Reed for his "efforts to improve infrastructure and create well-paying jobs and business opportunities in the city and state for all Georgians."