Summary: Crain's politics reporter A.D. Quig discusses Mayor Lightfoot, the Chicago Teachers Union and the executive stoking the union's flammable rhetoric. Plus: The most expensive university in the country is also the most popular, and it's right here; Cars.com nixes sale plans; why Mariano's isn't so upscale anymore; Gov. Pritzker launches a property tax task force, and insight on why giant health insurer Health Care Service Corp. is seeking a new CEO. Follow @AmyGuth on Twitter and continue the conversation with #CrainsDailyGist.
