Former Trump aide testifying before coup grand jury
MSNBC\u2019s Ari Melber hosts \u201cThe Beat\u201d on Thursday, July 20, and reports on Trump\u2019s legal battles and Elon Musk. Plus, legendary writer-director Christopher Nolan sits down with Melber ahead of the release of his newest film Oppenheimer. Chai Komanduri and David Kelley also join.