Is Milwaukee the most racially and politically divided city in the United States?

[youtube https://www.youtube.com/watch?v=ZyEVu8NSWcs&w=620&h=315] Back at the end of 2010, Milwaukee topped a Brookings Institution study on the most racially-segregated metro areas in America. Now, take a look at this map of the 2012 Presidential results from Milwaukee and surrounding counties:

That data originally comes from here, which notes that amo…