US Attorney General William P Barr has criticised President Donald Trump for tweeting too often.
Barr told ABC it was "impossible" to do his job with the President's constant tweeting.
"To have public statements and tweets made about the department, about our people in the department, our men and women, about cases pending in the department and about judges before whom we have cases, make it impossible for me to do my job," he said in an interview on Thursday.
The comments have come after the team prosecuting Roger Stone left the criminal case when the Justice Department planned to reduce Stone's sentence.
Barr said Trump's tweets make it difficult for him to assure the courts and the prosecutors that they are doing their work with integrity.
He added, he wasn't going to be bullied by anybody Congress, newspaper editorial boards or the president, into not doing what he thinks is right.
"I cannot do my job here at the department with a constant background commentary that undercuts me," he told ABC.
The President has since tweeted about Roger Stone and Barr's comments.
"Now it looks like the fore person in the jury, in the Roger Stone case, had significant bias. Add that to everything else, and this is not looking good for the "Justice" Department. @foxandfriends @FoxNews," he tweeted on Friday.
In response to Barr's comments he tweeted that although the Attorney General said "The president has never asked me to do anything in a criminal case, it doesn’t mean he does not have, as President, the "legal right to do so, I do, but I have so far chosen not to!"
