The vote to hold Barr in contempt marks the first time that House Democrats are moving to punish a Trump administration official for defying a congressional subpoena and represents a dramatic escalation in tensions between Democrats and the White House.
The Justice Department declined to comment. House Judiciary Committee Chairman Jerrold Nadler subpoenaed the full document and underlying evidence, setting an initial deadline that Barr missed last week. Hours after Barr stood them up, House Speaker Nancy Pelosi said she believed the attorney general had lied about his communications with Mueller in testimony last month, and that was a "crime".
In a 27-page report, the House Judiciary panel outlines why the committee is demanding Mueller's full report - and mentions the prospect of impeachment.
The signatures were collected by the nonprofit group Protect Democracy, which counts Justice Department alumni among its staff and was contacted about the statement last week by a group of former federal prosecutors, said Justin Vail, an attorney at Protect Democracy.
"The attorney-general's failure to comply with our subpoena ... leaves us no choice but to initiate contempt proceedings", Nadler said in a statement.
"Congress must see the full report and underlying evidence to determine how to best move forward with oversight, legislation, and other constitutional responsibilities", Nadler said in a statement.
Republicans reject Nadler's efforts as political theater, which they say is meant to satisfy the Democrats' voters.
"They know the Justice Department is working to negotiate even as they pursue contempt charges, making their move today illogical and disingenuous".
We served under both Republican and Democratic administrations at different levels of the federal system: as line attorneys, supervisors, special prosecutors, United States Attorneys, and senior officials at the Department of Justice.
In a pair of tweets, Trump said the special counsel should not appear before the House Judiciary Committee and questioned why the Democratically-controlled committee would need Mueller's testimony after concluding his two-year investigation into allegations of collusion between Russian operatives and Trump associates during the 2016 presidential campaign and transition. "That's up to our attorney general, who I think has done a fantastic job". The chairs of five other House committees investigating the president have also called for its release.
Mueller reported that Trump in mid-2017 ordered McGahn to have Mueller removed.
The letter cites Trump's efforts to fire Mueller 'and to falsify evidence about that effort, ' his efforts to limit the scope of the Mueller probe, and to 'prevent witnesses from cooperating with investigators probing him and his campaign'. The statement argues the Justice Department's policy of not indicting sitting presidents is the reason Trump avoided prosecution.
Trump denied any wrongdoing in a tweet on Monday.
"Are they looking for a redo because they hated seeing the strong NO COLLUSION conclusion?" the president tweeted, in relation to his claim that the report cleared him of any wrongdoing. "Nevertheless, the tables are turning!"
Democratic lawmakers expressed their displeasure with Trump's position.
USA to Impose Higher Tariffs on Chinese Exports
It has since imposed 10 per cent tariffs on $US200 billion in Chinese imports and 25 per cent tariffs on another $US50 billion. On Friday, he had cited good progress in trade talks and praised his relationship with Chinese President Xi Jinping .