Citing government officials and others familiar with the situation, the Times said some members of Mueller's team believe Barr should have included more of their material in the summary he released on March 24 of the investigation into Russian meddling in the 2016 USA presidential campaign.
U.S. Attorney General William Barr, who received the confidential report last month at the close of Mueller's 22-month investigation, has said he meant to release a redacted version to Congress and the public by mid-April.
"The Department continues to work with the Special Counsel on appropriate redactions to the report so that it can be released to Congress and the public", Kupec said in a statement.
At the same time, the House Judiciary Committee authorized its chairman to use a subpoena to try to force the Justice Department to give Congress a full copy of the special counsel Mueller's report and all of the underlying evidence used to reach his conclusions on Russian interference in the 2016 election. The special counsel's investigators had already written multiple summaries of the report, and some team members believe that Mr. Barr should have included more of their material in the four-page letter he wrote on March 24 laying out their main conclusions, according to government officials familiar with the investigation.
Nadler's panel shifted its focus to subpoenas to obtain the Mueller report when it became clear Barr would ignore a Democratic demand turn it over unredacted by a Tuesday deadline.
Investigators said that their final report did not "exonerate" the president.
Barr further concluded there was insufficient cause to find that Trump obstructed justice in the case by firing former FBI Director James Comey, among other things.
The committee did not issue the subpoena immediately. It seems clear some people in Mueller's office (the whole team of 19 lawyers and 40 FBI investigators and additional staff didn't comment to the press) felt the need to fire a warning shot at Barr: He won't get away with covering anything up, especially if he tries to misrepresent what they said. Muller made no recommendations for indictments regarding alleged "collusion" between Trump's 2016 presidential campaign and Russian Federation or regarding alleged obstruction of justice.
Mr. Mueller found no collusion between the two, and in a summary of the report, Attorney General William Barr said that he and the deputy attorney general found that evidence was not sufficient to support a finding of presidential obstruction of justice.
He said he would have to redact secret grand jury information, classified information concerning sources and methods, and information tied to "peripheral" figures in the investigation.
Meanwhile, the president and his allies have continued to tout Barr's summary of the Mueller report as a "total exoneration".
Barr, appointed by the Republican president, has pledged to release a redacted version of the report by mid-April.
Despite Barr's decision to work with the special counsel to review the report and determine which areas contain sensitive material that needs redactions, House Democrats are calling for the full report, sans redactions, to be turned over to Congress for review.
However, federal regulations say a special counsel has "the full power and independent authority to exercise all investigative and prosecutorial functions of any [U.S.] Attorney", which operates "under the supervision and direction of the Attorney General".