A Justice Department spokeswoman declined to say whether this means there will be no claims of executive privilege invoked over any part of Mueller's report or whether Barr might, at some point, advise Trump to invoke the privilege over some sections, or whether Barr might do so unilaterally.
House of Representatives Judiciary Committee Chairman Jerrold Nadler, already pressing Barr to release the entire unredacted report to Congress, expanded his demands.
"Looks like Bob Mueller's team of 13 Trump Haters & Angry Democrats are illegally leaking information to the press while the Fake News Media make up their own stories with or without sources - sources no longer matter to our corrupt & dishonest Mainstream Media, they are a Joke!", Trump tweeted.
House Democrats have also asked the country's tax agency, the Internal Revenue Service, to turn over the last six years of Trump's federal tax returns, which, breaking custom from previous presidents the last four decades, Trump has refused to disclose.
Last week news reports suggested that members of Mueller's team are frustrated with Barr's letter, which they saw as oversimplifying their more complicated findings. "This is a show by the Democrats". While Mueller and his team did not reach a conclusion on whether Trump obstructed justice, and reportedly laid out evidence on both sides of the question, Barr said in his summary that there is not enough evidence to establish the president obstructed justice - a conclusion some lawmakers felt was premature without the full report in hand.
Mr Trump, who declared a "complete and total exoneration" when Mr Barr announced Mr Mueller's conclusions, said that Democrats "are fighting hard to keep the Witch Hunt alive".
Bernie Sanders raised $18.2 million in first quarter
Plus, he did it with more small donors than any other candidate so far, leading the pack among the sought-after demographic. The totals for the first quarter, which ran through to March 31, are the first measure of how candidates are performing.
President Trump's personal attorney Rudy Giuliani said he's "not worried" about the looming release of a redacted version of special counsel Robert Mueller's 400-page report, saying the president wants "maximum transparency".
But Barr's phrasing in that letter is somewhat ambiguous.
The memo came to light in December only after Trump had sacked Sessions and chosen Barr to replace him.
Collins then slammed Nadler as "loath [ing] to begin an impeachment hearing when the facts do not support one" and cited the legal precedent for bringing grand jury materials before Congress. He is expected to face extensive questioning about the Mueller report and his ongoing redaction process, though, and his testimony will be scrutinized for any sign he is trying to protect the president. As often done in such high-profile cases, Mueller used the panel of citizens to develop and hear the evidence and depose key witnesses behind closed doors.
Democrats argue that Congress, in its constitutional responsibility to enforce the law against the president, has the right to review any evidence against him of wrongdoing, even that of a grand jury.