Mayor Brandon Johnson's plan to push out the current zoning board chair has sparked independence concerns from City Council. Crain’s politics reporter Justin Laurence discusses with host Amy Guth.Plus: Work begins on $730 million O'Hare concourse, Pritzker signs toxic-tort bill that biz groups fear will open door to more lawsuits, Chicago developer buys River North loft office building and Bally's falls far short of $250 million casino stock sale target.