Ex-House Speaker Michael Madigan is set to return to the stand Wednesday morning, continuing testimony that will surely be some of the most crucial and closely examined of the bombshell public corruption trial.

Madigan, the longest-serving legislative leader in U.S. history, was charged with bribery, racketeering, wire fraud, and other crimes.

Over the past 2½ months, the jury in former Illinois House Speaker Michael Madigan’s corruption trial has heard the longtime Democratic leader’s voice dozens of times on wiretapped phone calls and in secretly recorded video footage.