Illinois politics has a deep culture of corruption. We’ll talk with one of the reporters behind a new Chicago Tribune series that tries to answer why.

Michael Madigan was often considered the most powerful politician in Illinois; however, yesterday, he was indicted on federal corruption charges. The 21st was joined by two political reporters to walk through what he's accused of and what we know about the investigation so far.

Illinois Governor J.B. Pritzker said Monday he has not spoken to House Speaker Michael Madigan about a series of federal inquiries. That’s despite reports that investigators appear to be targeting the speaker's inner circle.

State Representative Luis Arroyo has resigned, one week after his arrest on federal bribery charges.

As a growing number of Illinois state lawmakers have been ensnared in recent federal probes, some of their colleagues want to ramp up punishment for public corruption.