As he enters his final days in office, Mayor Emanuel joins us in conversation. Plus: What Illinois can learn from California’s experience with legalized pot, and a new book on the world’s fastest man.

• The Escalating Trade War, and What it May Mean for US Consumers
• Mayor Rahm Emanuel Joins ‘Chicago Tonight’ for Exit Interview
• The Growing Business of Cannabis in San Diego
• ‘World’s Fastest Man’ Remembers Cyclist Marshall ‘Major’ Taylor