This week, Donald Trump became the third president in US history to be impeached. What does that mean? Why is House Speaker Nancy Pelosi waiting to send the articles of impeachment to Senate Majority Leader Mitch McConnell? And what should we expect from the upcoming Senate trial? Vox’s Matt Yglesias explains it all.   Then, we have something special this week. Vox teamed up with PerryUndem to conduct a focus group with undecided voters in Pennsylvania on the impeachment process. This conversation is different than our usual, but it is equally, if not more, crucial to understanding some of the most important forces at play in impeachment — and our politics more broadly.  And, at the end, some reflections on what all of this means for not just American politics, but how, and whether, Americans feel they can participate in our politics. Want to contact the show? Reach out at ezrakleinshow@vox.com Ezra's book is available for pre-order! You can find it at www.EzraKlein.com. You can subscribe to Ezra's other podcast The Ezra Klein Show on Apple Podcasts, Spotify, Stitcher or wherever you get your podcasts Credits: Producer, Engineer, Editor - Jeff Geld Researcher - Roge Karma EP - Liz Nelson Theme music composed by Jon Natchez  Learn more about your ad choices. Visit podcastchoices.com/adchoices