In Chicago, Mayor Rahm Emanuel fired his police chief and faces a growing clamor for his resignation.
In Baltimore, Mayor Stephanie Rawlings-Blake fired her police chief and abandoned plans to seek re-election.
And in San Francisco, protesters are demanding the head of yet another police chief, prompting Mayor Edwin Lee to vow last week to overhaul police procedures regarding deadly force.
"Black lives do matter," Lee, a Democrat, assured reporters.
Across the nation, protesters are no longer satisfied with indictments or special prosecutors when evidence emerges that someone has died unnecessarily at the hands of police. Instead, they have been seeking -...