Could Bernie Sanders win in 2020?

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Senator Bernie Sanders formally launched his 2020 presidential campaign in February, joining one of the most crowded and diverse field of democratic candidates in history. But he's not an underdog this time, and he’s not the only progressive on the ballot. Democratic strategist Waleed Shahid joined THINK to talk about how Sanders will need to differentiate himself from the rest of the field to win in 2020.