'Un-American': Obama lawyer warns Trump's postal chief of possible 'criminal liability'

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Trump’s postmaster general Louis DeJoy agrees to testify in an emergency House session amid fierce criticism for changes to mail flow. Former acting U.S. solicitor general and MSNBC Legal Analyst Neal Katyal joins Ari Melber saying “that is an ugly place to be” and “there is nothing more un-American than messing with an election.”