Joe Biden hasn't given much insight into how he's choosing his running mate. As POLITICO's Marc Caputo puts it, "There's really only six or seven people in the United States who know what the hell is going on." In Part Two of Dispatch's Veepstakes series, Caputo explains what you need to know about four of the top contenders: Val Demmings, Tammy Baldwin, Karen Bass and Kamala Harris.

Marc Caputo covers the 2020 presidential campaign for POLITICO.
Jeremy Siegel is a host for POLITICO Dispatch.
Irene Noguchi is the executive producer of POLITICO audio.
Jenny Ament is the senior producer of POLITICO audio.

Read more: Tracking Joe Biden's VP pick

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