Updated at 10:56 a.m. ET

Attorney General William Barr suggested on Tuesday he'd negotiate with leaders in Congress who want to see the secret evidence that underpins special counsel Robert Mueller's report.

Barr reaffirmed to members of the House Appropriations Committee that the first version of the report he plans to release — within one week, he said — would be redacted.

Then, if the leaders of the House and Senate Judiciary Committees want to see more, the attorney general said he would play ball.

"I'm glad to talk to Chairman Nadler and Chairman Graham as to whether they feel they need more information and if there's a way we can accommodate that," Barr said.

House Judiciary Committee Chairman Jerry Nadler, D-N.Y., has been unequivocal in calls for access to the full work product from Mueller's office — not only his report but the testimony, intelligence and other material that supported his findings.

Senate Judiciary Committee Chairman Lindsey Graham, R-S.C., also would be eligible, Barr said. The attorney general also announced something else likely to please Graham: a forthcoming report about investigators' use of the Foreign Intelligence Surveillance Act in the Russia investigation.

Graham has joined other Republicans in calling for answers about how authorities used material from the former British intelligence officer Christopher Steele, author of the infamous Russia dossier, in the request for surveillance of Carter Page, a onetime junior Trump 2016 campaign aide.

Inspector General Michael Horowitz's report about that could be done in May or June, Barr said.

The attorney general also said the door appears open to more investigations or reports about the conduct of the Russia investigation — music to the ears of Republicans who have followed the lead of President Trump in calling it a "witch hunt" or suggesting it's the product of a conspiracy by the FBI and the Justice Department.

"More generally I am reviewing the conduct of the investigation, trying to get my arms around all the aspects of the counterintelligence investigation that was conducted during the summer of 2016," Barr said.

Standoff deferred?

The Democratic majority on the House Judiciary Committee voted to authorize Nadler to issue a subpoena for Mueller's work product and evidence if necessary, but Barr's comments on Tuesday suggested that might not be necessary — although granting access to Nadler might also take place after the redacted Mueller report has been released.

It wasn't immediately clear whether Nadler would agree to the place in line Barr had given him or whether he might insist on access to Mueller's full material at the same time the redacted document appears.

Barr also told lawmakers later in the hearing that he isn't planning on giving an unredacted copy of the Mueller report to Congress absent the negotiations he said he'd be open to undertaking with Nadler.

In other words, Nadler won't get a copy without at least asking and, perhaps, a separate dispute.

Barr wrote to Congress last month that Mueller's investigation did not establish a conspiracy between President Trump's campaign and the Russian interference in the 2016 election.

Barr also wrote that Mueller's office neither fully implicated nor exonerated Trump on the question of obstruction of justice; Barr and Deputy Attorney General Rod Rosenstein decided Mueller's findings were "not sufficient," as Barr wrote.

Trump welcomed that summary and has claimed full vindication by Mueller. Graham and others took the opportunity to go on offense for themselves by amplifying calls for inquiries into the conduct of the investigation itself.

Democrats say they can't know what to make of Mueller's findings until they see them for themselves, but Barr's office has been working with Mueller's team to redact material before anyone outside a handful of Justice Department officials sees the report.

The excisions fall into four categories, as Barr repeated to Congress on Monday:

-Those involving grand jury material, which is kept secret by law;

-those involving foreign intelligence, which is sensitive when it reveals the sources or methods by which it was obtained;

-those that implicate ongoing cases, including the investigations or prosecutions that spun out of Mueller's office;

-and those that would violate the privacy of people Barr called ancillary to the main story.

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