It’s been a historic week, with news that House Speaker Nancy Pelosi has officially opened an impeachment inquiry into President Donald Trump. There’s no better expert to examine the recent events in Washington than Prof. William Howell, one of the leading scholars on the power of the American presidency. In this episode, he discusses the historical context of impeachment, the Republicans’ response, the inquiry’s effect on the Trump presidency and its potential impact on the 2020 election. Subscribe to Big Brains on Apple Podcasts, Stitcher and Spotify.