This week on the Nerdcast with host Scott Bland: We examine some of the front-runners who have begun to emerge for Democrats, particularly on the left of the party. POLITICO's National political reporters Holly Otterbein and Alex Thompson check on the 2020 race. Also: What would you ask Robert Mueller, if you got the chance? POLITICO's national security correspondent Natasha Bertrand and POLITICO's legal affairs analyst Josh Gerstein discuss what might happen on Capitol HIll for Robert Mueller.

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