This will, in all likelihood, be the fourth time a US president is impeached. But it’ll be a devilish story to follow. Already, there are more threads, places, names, and events than even full-time reporters can remember. What’s the role of the EU ambassador? What was Rudy Giuliani doing for Donald Trump in Ukraine? Why is Australia involved? What’s the secret server where the Trump administration stored damaging call records? Why was America involved in firing a Ukrainian prosecutor in the first place? And what does Joe Biden have to do with any of this? Keeping up with the daily revelations, statements, and disputes is difficult enough. But understanding impeachment demands grappling with deeper questions in our political system — questions that don’t get covered in the daily news but will shape the process from here. What did the Founders mean by “high crimes and misdemeanors”? How does an impeachment trial work? Has partisan polarization broken the impeachment process? How do other countries handle impeachment? How does polarized media change the way impeachment will play out? Every Saturday, Vox's founder and editor-at-large Ezra Klein will do just that – through deep conversations with Vox reporters and leading policy voices about what’s going on, why it matters, and where it leaves us now. Subscribe to Impeachment, Explained on Apple Podcasts, Spotify, Stitcher, Overcast, Pocket Casts, or your favorite podcast app to get stay updated on this story every week. Learn more about your ad choices. Visit podcastchoices.com/adchoices