As part of FRONTLINE’s Transparency Project, all this week we’re publishing key interviews conducted as part of the reporting for The Choice 2020: Trump vs. Biden, a two-hour documentary special about the major-party political candidates. The Choice 2020: Trump vs. Biden airs on PBS and online Tuesday, September 22nd. Read more about Frontline’s Transparency Project at frontline.org.

In this episode, Valerie Biden Owens is interviewed by FRONTLINE’s Jim Gilmore. Valerie Biden Owens is Joe Biden’s sister and has managed his seven senatorial campaigns, as well as his presidential campaigns. She talks about Joe Biden’s childhood in their Catholic family, including his struggles with a stutter and how that shaped his character.