They also asked about when and how much of the full report would be released. But like members of the House on Tuesday, senators are expected to be more interested in the almost 400-page Mueller report than budget details.
Despite Barr's favorable conclusion for Trump, more damaging information could be revealed through release of the full report, and House Democrats are hunting for areas where Barr may have shaded the truth in the president's favor. "But, I'll have to say, until someone shows me a provision in 6 (e) that permits its release, Congress doesn't get 6 (e)".
Barr said he plans to release the redacted version of the report "within a week".
Republicans defended Barr, with Alabama Rep. Robert Aderholt comparing Democrats' questions to theories surrounding President John F. Kennedy's 1963 assassination. Last week, the House Judiciary Committee authorized a subpoena for the full report in case Barr does not make the entire document available.
Barr will testify today before the Senate Appropriations Committee.
President Trump has called the special counsel investigation a "witch hunt", and he tweeted in May 2018 that he was demanding the "Department of Justice look into whether or not the FBI/DOJ infiltrated or surveilled the Trump Campaign for Political Purposes". "That's something that has been really important to us".
In addition, the fact that the report, despite relentless spinning by Attorney General Bill Barr, doesn't completely exonerate the president of obstruction of justice charges should give Americans cause for concern.
Six leading Democrats, however, say they will fight the redactions.
Barr was grilled by Democrats on the handling of that summary, which stated the special counsel found no evidence of collusion between members of the Trump campaign and Russian Federation during the 2016 election.
While the president unleashed his personal grievances, his team seized on any exculpatory information in Barr's letter, hoping to swiftly define the conversation, according to six White House officials and outside advisers who spoke on condition of anonymity because they were not authorized to publicly discuss private deliberations.
Barr also suggested that the report would not be filled with pages of redactions.
Barr said he is working with the Special Counsel to identify information that falls under those four categories, and that any redactions will be color-coded and accompanied by explanatory notes describing the basis for that redaction.
Although Mr Barr admitted that he will release the report quickly, he also confirmed that he will not provide Congress with an unredacted version.
Mr Giuliani not only insisted that there was "nothing" in the report but also that it should be brought before Congress.
"Trump made an impressive effort at creating an obstruction case against himself, but it's no easy task to obstruct an investigation where prosecutors do not believe there's an underlying crime", George Washington University law professor Jonathan Turley said.
House Judiciary Committee chair Rep. He added, "My intention is not to ask for it at this stage".
In excerpts from her opening statement released Monday night, House Appropriations Committee Chairwoman Nita Lowey, D-N.Y., said that Barr's summary letter "raises more questions than it answers".