Four "sanctuary city" mayors faced a grilling before Congress this week. How did Chicago's Brandon Johnson perform? You'll hear his grade from Chicago Tribune investigative reporter Gregory Royal Pratt. Pratt is literally writing the book on City Hall, and breaks down the chaos of a 6-plus hour hearing on Capitol Hill that questioned Chicago's role in immigration reform. Lissa & Thom get into the weeds on the city's fractured political factions, and the future of reporting in the age of social media. Plus, Greg Pratt offers his list of politicians who can bridge the gaps between deeply divided power groups. Pratt is author of the book The City is Up for Grabs.