Key witnesses testify Ukraine quid pro quo directed by Mulvaney

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Newly released transcripts of key witnesses detail that the pressure campaign on Ukraine by the White House was "explicit" and "blatant" and orchestrated by Chief of Staff Mick Mulvaney as potential witness John Bolton reveals he has relevant information that impeachment investigators do not. Ali Velshi discusses with Rep. Harley Rouda, Natasha Bertrand and Neera Tanden.