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Mueller testimony: 3 key questions Congress should ask


NBC News analysts former Sen. Claire McCaskill and former Acting Solicitor Gen. Neal Katyal preview Robert Mueller’s testimony ahead of his hearing. Katyal says lawmakers should focus on three questions: “No.1, Mr. Mueller, did you find no obstruction? No. 2, Mr. Mueller, did you find no collusion? No. 3, Mr. Mueller, did your report totally exonerate the president?”