Who is running the show in Philly, Detroit and San Francisco?

In "Who Lost the Cities?" Kevin Williamson drops this tidbit about Nancy Pelosi's hometown:

The more progressive the city, the worse a place it is to be poor and/or black. The most pronounced economic inequality in the United States is not in some Republican redoubt in Texas but in San Francisco, an extraordinarily expensive city in which half of all black households make do with less than $25,000 a year. Blacks in San Francisco are arrested on drug felonies at ten times their share of the general population. At 6 percent of the population, they represent 40 percent of those arrested for homicides. Whether you believe that that is the result of a racially biased criminal-justice system or the result of higher crime incidence related to socioeconomic conditions within black communities (or some combination of those factors) what is undeniable is that results for black Americans are far worse in our most progressive, Democrat-dominated cities than they are elsewhere. The progressives have had the run of things for a generation in these cities, and the results are precisely what you see.

This is the system that race hucksters like Jessie Jackson and Al Sharpton wanted.