Chicago is very nearly the home of patronage politics. See an ABC News article about Mayor Rahm Emanuel's personal police protection detail being made up of officers who worked in or contributed to his campaign or are African-American.
As you might guess, white and Hispanic officers who were transferred out of the detail are suing on the basis of discrimination. They seek reinstatement and back pay.
Chicago politics was bad enough when it was confined to Chicago; for the last ca. 4 years we have also had it in Washington. The Holder Justice Department appears to operate in this same fashion, as does the White House.