It's been revealed that Robert Mueller, the Special Prosecutor who investigated ties between the Trump campaign and the Russians, wrote to President Trump's Attorney General complaining about his claim that investigators had exonerated the President.
The revelation is leading to calls for William Barr's resignation, with Democrats saying they may move to impeach him.
Our Washington Correspondent Simon Marks reports.
IN: "For a month…."
OUT: "….claims it says"
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