How far will the GOP's impeachment inquiry into Joe Biden go? 12:19

The House of Representatives voted – along partisan lines – to formalize an impeachment inquiry into President Joe Biden. The inquiry kicks off a formal investigation. So here’s what they’re looking into. On Deadline is hosted and produced by Lauren Barry. It's also produced by Joe Hiti, Christy Strawser, Bill Smee and Myron Kaplan. Sound design by Joe Hiti.