House Judiciary Committee Chairman Jerrold Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.) is threatening a contempt citation against Attorney General William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE if the Justice Department (DOJ) does not comply with a subpoena for special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s unredacted report.

Speaking to reporters Wednesday evening, Nadler said that if he is unable to reach a “reasonable” agreement with the DOJ “in the next day or two,” he would seek a contempt citation against Barr.

“I will continue to work with the attorney general to reach a reasonable accommodation on the access to the full report and the underlying evidence — but not for much longer,” Nadler said. “There are many questions that must be answered.”

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Barr released a reacted version of the Mueller report last month, but Nadler quickly subpoenaed for the full report, setting a deadline of May 1. Nadler said Wednesday that the administration informed him they would not turn over the report.

Roughly 10 percent of the public report is redacted to conceal grand jury material, details on ongoing investigations, classified information and details that could impact the privacy of third parties. Barr has allowed a select group of lawmakers, including Nadler, to review a less-redacted version of the report, but Democrats have objected to the arrangement because it leaves many in Congress unable to view information.

In a Wednesday letter to Nadler, Assistant Attorney General Stephen Boyd wrote that the subpoena is “not legitimate oversight” and that the committee had not articulated any “legitimate legislative purpose” for requesting the entirety of Mueller’s underlying evidence.

Boyd also wrote the department could not give the panel access to Mueller’s full unredacted report because it contains grand jury material, which is subject to secrecy rules and cannot be released in the absence of a court order.

Boyd asserted that Barr had already made “extraordinary accommodations” to Congress with respect to Mueller’s report and is willing to meet the “legitimate information needs” of the committee.

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“But this subpoena is not legitimate oversight. The requests in the subpoena are overbroad and extraordinarily burdensome. More importantly, these requests would pose a fundamental threat to the confidentiality of law enforcement files and the Department’s commitment to keep law enforcement investigations free of political interference," Boyd wrote.

He said the Department was “unable” to provide Mueller’s files but is not closing the door “on engaging with the Committee about potential further accommodations in response to a properly focused and narrow inquiry that is supported by a legitimate legislative purpose.”

Barr was supposed to testify before the House Judiciary Committee Thursday on Mueller’s report, but informed Nadler on Wednesday that he would not be showing up due to the Justice Department's objections to Democrats’ plans to have committee staff question the attorney general in addition to members of Congress grilling Barr.

The attorney general testified to the Senate Judiciary Committee on Wednesday.

--Updated 8:19 p.m.