That's the Ticket Episode 1: Vet on It

In the first episode of this three part mini-series, Dan Pfeiffer
and Alyssa Mastromonaco break down the vetting for vice
presidential candidates - how it happens, why it's so secret, and
what can go wrong. They'll talk you through the history of the
vetting process, their experiences on the Kerry and Obama
campaigns, and how they think the Biden campaign is approaching
the process.