In a second letter sent on Friday to the Senate and House Judiciary committee chairs, Barr said that by mid-April, if not sooner, he expects to send Congress Mueller›s full report, minus portions that will be redacted for reasons of legality, national security, or protection of "peripheral third parties".
In his letter, Barr said he shares a desire for Congress and the public to be able to read Mueller's findings, which are included in the almost 400-page report the special counsel submitted last week.
He said he would testify publicly before the Senate Judiciary Committee on 1 May, and the House Judiciary Committee the following day, and denied that his letter released last week was a "summary" of Mr Mueller's report, instead referring to it as a "supplemental notification".
According to a four-page summary of Mueller's principal conclusions, there was no evidence that the Trump campaign or anyone associated with it "conspired or coordinated" with Russian Federation to influence the 2016 presidential election.
Mr Barr has described the report as almost 400 pages long, not including the tables and supporting materials, which he said sets forth Mr Mueller's analysis, findings and the reasons for his conclusions. U.S. Attorney General, William Barr, concluded that evidence of obstruction of justice was insufficient to charge the President of the United States.
The length of Mr. Mueller's still-confidential report makes clear that there are substantially more details that he and his team have documented in their investigation than Mr. Barr disclosed to Congress and the public.
President Trump went on to repeat his claim that the report was a "total exoneration, complete vindication" - an expression which has jarred with some, given that Mr Mueller's report explicitly stated that investigators were unable to exonerate the president of obstruction of justice.
Barr reported that Mueller made one conclusion and one non-conclusion.
A grand jury that was involved in the Russian Federation investigation is "continuing robustly", federal prosecutor David Goodhand said Wednesday during a hearing over whether court filings in the Mueller probe should be unsealed related to an unidentified foreign corporation that had refused to turn over documents to the special counsel.
Our office has proudly hosted more town halls than nearly any other Member of Congress, and for two years now, I have heard countless voters vehemently opposed to the Mueller investigation.
Special Counsel Robert Mueller, a former Federal Bureau of Investigation director who headed the probe, was assisting with the task, he said.
Barr says he wants the public to be able to read Mueller's findings. In a late-afternoon gathering last Sunday, aides convened in press secretary Sarah Sanders' office for a champagne toast after the attorney general's chief of staff phoned Emmet Flood, in Palm Beach with the President, to brief him on the report. House Intelligence Committee Chairman Adam B. Schiff (D-Calif.) has suggested that Mueller didn't probe this question closely enough, and that he would. After two days, Mr Barr released a four-page summary of the more-than 300-page report.
Some government publications have become popular books, notably the Warren Commission report on President John F. Kennedy's assassination and the "Starr Report" on President Bill Clinton's affair with White House intern Monica Lewinsky. "We don't need you interpreting for us".
Senate Judiciary Chairman Lindsey Graham of SC, meanwhile, said of Barr's letter: "I look forward to hearing from Attorney General Barr on May 1".
"There is ample precedent for the Department of Justice sharing all of the information that the Attorney-General proposes to redact to the appropriate congressional committees", Mr Nadler said in a statement.
The heated, partisan back-and-forth at times overshadowed an intelligence hearing meant to discuss Russia's election interference in 2016 and ongoing threats to the United States.
In a typically free-form, 90-minute speech, Mr Trump derided the investigation using crude language.