When Donald Trump’s impeachment trial begins—whenever it begins—the Senate will be divided between Democrats, who will demand to hear from all the first-hand witnesses who defied the impeachment inquiry, and Republicans who will want to acquit Trump without letting any new incriminating information come to light.

Brookings Institution Senior Fellow Sarah Binder joins host Brian Beutler to walk us through all the arcane rules and requirements senators will have to navigate if they hope to hold a fair trial—or a coverup.