Arthur Ewenczyk: Democratic chief counsel, House Oversight and Accountability Committee

Arthur Ewenczyk is a tax attorney-turned-congressional investigator who has helped Democrats navigate the impeachment probe into President Biden. Ewenczyk, 36, spent more than five years as a Justice Department prosecutor on tax cases, inspired to take on one of the wonkiest areas of law. But while taking down tax cheats one by one, Ewenczyk realized...