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Watch Michael Cohen excoriate Trump alleging crimes In Office

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In a historic day in Washington, Donald Trump’s former lawyer, Michael Cohen, testifies against him in public under oath, before the House Oversight Committee. MSNBC Chief Legal Correspondent, Ari Melber, breaks down how in the extraordinary, unprecedented testimony, Michael Cohen excoriated Trump, and alleged he lied about hush payments, knew about Wikileaks emails, ran for profit and struck alliances to kill stories. Cohen's friend, Donny Deutsch, who spoke to him shortly after his testimony tells Ari Melber about Cohen's response to the hearing.