NPR’s Steve Inskeep unpacks the House inquiry: the case against President Trump as it is understood so far, his defense, and the players offering the most critical testimony. At the center of the inquiry is a whistleblower’s complaint about the President’s actions on a call to the president of Ukraine. Did the president abuse his power when he asked for investigation into a political rival? Inskeep and the NPR team step through the story in this hour-long special from NPR news.