Trump nightmare? Dem Chair says Mueller testifying by 'end of summer'

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Judiciary Committee Chairman Jerry Nadler joins The Beat for his first interview since his John Dean obstruction hearing. Nadler reveals Mueller will testify “way before” the end of summer and that there are ongoing “conversations” about it. Nadler also vows to take Don Mcgahn or “any other witness” to court if they don’t comply with subpoenas, and adds that pressure on Attorney General Barr is working.