How Barr's DOJ "aided" Trump's Mueller Response

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The Mueller Report is coming out tomorrow, and the Trump DOJ has announced a press conference Thursday morning with Attorney General William Barr and Deputy AG Rod Rosenstein. MSNBC Chief Legal Correspondent Ari Melber discusses how the facts from the Mueller report will not come from these government officials- they will come from the report itself, and that material will be presented in context with other known evidence.