Nadler said that the extended questioning was justified "given the attorney general's lack of candor before other congressional committees".
"Nobody is above the law, not president of the United States and not the attorney general".
Speaker of the House Nancy Pelosi didn't mince her words Thursday about the attorney general of the United States. Mr. Barr has since released the full Mueller report with minor redactions, as he promised, and with the "context" intact.This trashing of Bill Barr shows how frustrated and angry Democrats continue to be that the special counsel came up empty in his Russian Federation collusion probe.
Barr's summary, Mueller wrote, "did not fully capture the context, nature, and substance of this Office's work and conclusions".
Democrats have charged that Barr was protecting Trump after he assessed Mueller's report on his own and declared there wasn't enough evidence that Trump had committed obstruction of justice.
Well, under oath, the attorney general confirmed that he had spoken to Mueller on the phone and that the special counsel had been "very clear" that the AG's letter laying out the conclusions was not inaccurate.
Committee Democrats vowed to issue a subpoena to force Mr Barr to testify, while Mr Nadler held out hope that the Attorney-General would reconsider and show up when the hearing convenes at 9am on Thursday.
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Barr has reportedly agreed to allow some lawmakers access to a less-redacted version of the report, provided they don't discuss it with their colleagues and leave their notes with the Department of Justice. They don't have the power to set hearing schedules or compel officials to appear.
"There is now public confusion about critical aspects of the results of our investigation", Mr Mueller wrote in his letter to Mr Barr.
Democratic Florida Rep. Charlie Crist asked Barr during a House Appropriations Committee hearing about news reports that members of the special counsel's team were "frustrated at some level with the limited information included in your March 24th letter".
"We will make one more good faith attempt to negotiate and to get the access to the report that we need, and if we don't get that, we will proceed to hold the attorney general in contempt", Nadler said.
Barr cites a disagreement over the questioning for his decision. Trump said he heard that Barr had performed "incredibly well" before the Senate panel. Democrats have accused Mr. Barr - whose job it is to be the nation's lawyer - of acting as Mr. Trump's personal counsel.
However, Mr Nadler told reporters he believed that Mr Barr was afraid to testify on Thursday given "how dishonest he has been". "Being the attorney general does not give you a back to say whatever you want and it is a fact because you are the attorney general".
Barr released Mueller's report on April 18, with some parts blacked out to protect sensitive information.
"The (special counsel's) inverted-proof-standard and "exoneration" statements can be understood only as political statements, issuing from persons (federal prosecutors) who in our system of government are rightly expected never to be political in the performance of their duties", Flood said, echoing Trump's longstanding position that Mueller's team is biased.