Mueller's investigators issued more than 2,800 subpoenas and executed almost 500 search warrants, so the potential grand jury material is voluminous.
Barr's initial letter summarizing what he called Mueller's "principal conclusions" was simply intended as a stop-gap to satisfy the overwhelming public curiosity about what the special counsel found, he said. The attorney general sent his four-page letter to Congress two days later.
Barr said he did not have insight into why some on Mueller's team were upset.
On Tuesday, Barr laid out what the Justice Department needs for law enforcement across the country, but he was mostly grilled on the Mueller report and his summary of the special counsel's findings. Now that the American public will get a look at details beyond the four-page investigation summary written by Attorney General William Barr, some Trump allies are concerned that the president was too quick to declare complete triumph and they're pushing the White House to launch a pre-emptive attack.
"If you think it's such an outrageous position, you have nothing to worry about", Barr said. He is expected to redact parts of the report that contain grand jury materials and classified information.
In his first appearance on Capitol Hill since taking office, and amid intense speculation over his review of special counsel Robert Mueller's Russian Federation report, Attorney General William Barr appears before a House Appropriations subcommittee on Capitol Hill in Washington, Tuesday, April 9, 2019.
He is likely to be asked to further explain himself at a Senate Appropriations subcommittee hearing Wednesday, though it's unclear how much more he will say.
Barr told a House subcommittee Tuesday that the redactions process was going "very well", and he would use color-coded categories and explain the rationale for the redactions that are made from Mueller's almost 400-page report.
Mueller concluded his investigation in late March and submitted a almost 400-page confidential report.
Three US troops, 1 contractor killed in Afghanistan IED blast, Pentagon says
The Taliban has balked at negotiating with the Afghans, which the group views as an American puppet organization. Three American soldiers were wounded in the blast and are receiving medical treatment, the statement also said.
Barr testified that he has no intention of turning the full, unredacted report to Congress.
But one quote from Mueller's conclusions that Barr revealed suggested a different view on obstruction.
Last week, Democrats on the House Judiciary Committee prepared subpoenas that they plan to issue to the Justice Department if Barr does not agree to release the Mueller report in full.
"[Mueller] and his people had been interacting with the deputy attorney general and lawyers supporting the deputy attorney general in his supervision of the Special Counsel, and in that context there had been discussions, so there was some inkling as to some of the thinking of the Special Counsel", he said.
Mr. Barr later released a four-page letter to Congress laying out what he said were Mr. Mueller's main findings and wrote that the Mueller probe did not establish that members of Mr. Trump's election campaign conspired with Russian Federation.
Mueller concluded his investigation in late March and turned over a almost 400-page report to Barr.
Attorney General William Barr has assembled a team to review controversial counterintelligence decisions made by Justice Department and Federal Bureau of Investigation officials, including actions taken during the probe of the Trump campaign in the summer of 2016, according to a person familiar with the matter.
Barr on Tuesday offered lawmakers an unemotional and technical defense of the Justice Department's efforts to strike down the Affordable Care Act, stating that it was his job as the country's top lawyer to argue the case but refusing to comment on whether it was smart policy.
Lowey said she understood that "portions of it must be redacted as a matter of law", but added, "My hope is that you will stop there and bring transparency to this process as soon as possible".
Barr said he gave the Mueller team a chance to review his summary of the Mueller report, but they declined.