The candidates for Illinois governor are both accusing the other of criminal conduct. WBEZ reporter Dave McKinney explains what led the state Attorney General to open a criminal investigation into Gov. Bruce Rauner’s handling of a Legionnaires outbreak at the Illinois Veterans Home in Quincy. But Democrat J.B. Pritzker isn’t squeaky clean either. This week, a report from the Cook County Inspector General surfaced accusing Pritzker of tax fraud. 

Each week at On Background, WBEZ’s team of political reporters brings you the backstory on the week’s big story. Host Becky Vevea and guests take you inside the back rooms of Chicago and Illinois government to better understand the people, places and forces shaping today’s politics.