Attorney General William Barr said on Wednesday he would look into whether USA agencies illegally spied on President Donald Trump's 2016 campaign, but acknowledged under sharp questioning by lawmakers that there was no evidence of wrongdoing.
"I think spying on a political campaign is a big deal", Barr told the panel.
"I think spying did occur", he said.
Asked again about spying at the end of the hearing, Barr tempered his tone "I am not saying improper surveillance occurred".
Former U.S. assistant attorney and Fox News contributor Andy McCarthy explains why it's "inaccurate" to call Attorney General William Barr's document on Mueller's findings a 'summary'.
"We're going to have to make some hard choices", Barr said.
Barr said Wednesday he expects to release a redacted version of the Mueller report next week, but Pelosi said it's only a "matter of time" before the full report is made public.
But that was before Barr released his four-page analysis of Mueller's report, which said the president was not exonerated by the special counsel.
Alleged abuse of power and alleged bias by the Federal Bureau of Investigation and DOJ have been longstanding themes of Trump and allies since special counsel Robert Mueller was commissioned to investigate whether Trump's campaign colluded with the Russian interference in the 2016 presidential election.
"As far as I'm concerned, I don't care about the Mueller report".
"This is not launching an investigation of the FBI", he added. "It was after my interrogation with the Mueller team that I went out, hired private investigators and found out the guy had used a fake name, Henry Greenberg, and that he had been working with the Federal Bureau of Investigation for 17 years".
Murkowski told Barr that there would be a group of senators willing to work with him and the Justice Department after the department's review.
Watch Barr's explosive testimony above.
Mr Trump described the investigation by former FBI director Robert Mueller as "an attempted coup".
Gardner said in a statement that he met with Barr earlier this year to discuss "the disconnect between federal and state marijuana laws" since most USA states and several territories and tribes allow some form of marijuana.
Barr noted much of this has been done already, both in Congress and by the Justice Department inspector general, but that he will pull it all together to see if there may be "remaining questions to be addressed".
Barr plans to investigate the FBI's decision to open a counterintelligence investigation against members of the Trump campaign.
It's not entirely clear what spying Barr is specifically referring to.
"I've heard their names", Barr responded, smiling.
The allegation that the surveillance was illegitimate, or at least politically motivated, is part of a broader set of allegations that have collectively come to be known as Spygate.
Supporters of the probe insist that USA officials were acting appropriately and in the public interest by investigating claims over the Trump campaign's engagements with Russian-linked figures.