Sen. Blumenthal: 'It is essential' Trump speaks to Mueller

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The Washington Post reports Rudy Giuliani met with Special Counsel Mueller and Mueller expressed his desire to interview Trump about potential obstruction of justice. Trump reportedly remains resistant to interviewing with the Special Counsel. Senator Richard Blumenthal tells Ari Melber if Trump refuses to interview with Mueller, that he should be subpoenaed to appear before the grand jury.