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Rpts: Mueller objected to Barr's characterization of his report's findings on Trump
Multiple reports reveal that Mueller complained in a letter to Barr that his memo "did not fully capture the context, nature, and substance" of his report. Calls are now growing for Barr to resign ahead of his testimony before the Senate Judiciary Committee. Lawrence O'Donnell discusses with Rep. Raja Krishnamoorthi, Rep. Ro Khanna, Neal Katyal and David Frum.