Nixon aide speaks on the Hill as Dems get some of Mueller's Trump probe evidence

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Fmr. Nixon White House Counsel John Dean joined fmr. U.S. Attorneys Joyce Vance and Barbara McQuade taking questions on the Mueller probe on Capitol Hill. This comes as Atty. Gen. Barr's DOJ finally turns over some evidence to House Democrats. Maya Wiley, Katie Benner, and Mike Memoli discuss.