Watch Trump AG Barr squirm under oath when pressed on guilty Trump aide

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After resisting and delaying requests to testify before House Democrats, AG Bill Barr went under oath for the first time as Trump’s Attorney General in a marathon hearing. MSNBC Chief Legal Correspondent Ari Melber reports on several key moments, including interventions favoring convicted felons who once worked for Donald Trump, in this excerpt from coverage of the hearing on The Beat.