Donald Trump says he has not asked his attorney-general to intervene in the sentencing of his disgraced friend Roger Stone "so far" – but insisted he had the right to do so if he chose.

As the row over alleged political interference in the justice system continued, the president tweeted a quote he attributed to William Barr before adding his own comment: "'The President has never asked me to do anything in a criminal case.' A.G. Barr  This doesn't mean that I do not have, as President, the legal right to do so, I do, but I have so far chosen not to!"

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