On June 11, Chicago Mayor Lori Lightfoot held a news conference with new Chief of Police David Brown. She was livid. She announced that she had been contacted by the office of Congressman Bobby Rush and presented with videos recorded on a night of rioting following anti-police protests at the end of May over the death of George Floyd in Minneapolis. The videos revealed thirteen policemen in Rush’s office, two dozing, others making coffee and preparing popcorn. Bobby Rush, indignant and upset, spoke as well. He castigated the officers for their having had “unmitigated gall” to make themselves coffee and...