WASHINGTON (Reuters) - Defying the U.S. Congress, Attorney General William Barr will not attend a House Judiciary Committee hearing on Thursday on his handling of Special Counsel Robert Mueller’s Russia investigation report, said panel Chairman Jerrold Nadler, accusing Barr of being afraid to testify.

U.S. Attorney General William Barr departs after testifying before a Senate Judiciary Committee hearing entitled "The Justice Department's Investigation of Russian Interference with the 2016 Presidential Election." on Capitol Hill in Washington, U.S., May 1, 2019. REUTERS/Aaron P. Bernstein

“Barr has just informed us that he will not attend tomorrow’s hearing,” Nadler, a Democrat, told reporters on Capitol Hill on Wednesday after a contentious Senate hearing earlier in the day where Barr defended his treatment of the report.

The Justice Department also said on Wednesday it would not comply with a subpoena seeking Mueller’s full report on Russian meddling in the 2016 election and underlying investigative files from the probe.

Committee Democrats vowed to issue a subpoena to force Barr to testify, while Nadler held out hope that the attorney general would reconsider and show up when the hearing convenes at 9 a.m. (1300 GMT) on Thursday.

“We plan on subpoenaing him if he decides not to show up. He can run but he can’t hide,” Democratic Representative Hakeem Jeffries told reporters.

A Justice Department spokeswoman said in a statement that the panel had placed “unprecedented and unnecessary” conditions on Barr’s testimony and called the questions posed by committee staff inappropriate. “The attorney general remains happy to engage directly with members,” the statement said.

Barr’s decision not to testify surfaced hours after the committee adopted a more aggressive format that would subject the attorney general to an extra hour of questions from committee lawyers, in addition to questions from Democratic and Republican lawmakers on the panel.

Nadler insisted that it was not the administration’s place to determine the format for the hearing.

“He is terrified of having to face a skilled attorney,” the chairman said of Barr. “Given how dishonest he has been ... I can understand why he’s afraid of facing more effective examination.”

‘EXTRAORDINARILY BURDENSOME’

The House Judiciary chairman also said he would consider a contempt citation against the attorney general if the unredacted version of the report was not made available.

In a letter to Nadler on Wednesday, Assistant Attorney General Stephen Boyd said the requests made in the subpoena were “overbroad and extraordinarily burdensome.”

The Justice Department has made available a version of the report that has fewer redactions than the one issued publicly, withholding only grand jury information that must be kept secret by law, he added. The department would be willing to seek an accommodation over more targeted requests for Mueller-related documents, Boyd said.

Nadler issued the subpoena on April 19, a day after Barr released a redacted version of the report, which also looked at whether President Donald Trump attempted to obstruct investigations after the 2016 election.

The Mueller report details a series of acts by Trump to impede the Russia probe but does not conclude whether those actions constitute the crime of obstruction. It found, however, that Trump and his campaign did not engage in a criminal conspiracy with Moscow.

Democrats contend that Barr misrepresented the contents of the Mueller report in a March 24 summary and during a subsequent news conference. They also allege that he may have provided misleading testimony to Congress about criticism he received from Mueller.

Some Democrats including Senator Mazie Hirono said on Wednesday that Barr should resign. Asked if he agreed, Nadler told reporters: “He’s going to have to answer for apparently testifying untruthfully in both the Senate and the House, and that’s certainly one option.”