The letter cites Attorney General William Barr's notice to Congress that Mueller's investigation did not find that the Trump campaign or anyone associated with it conspired with Russian Federation to influence the 2016 presidential election.
Shaking her fist for emphasis, House Speaker Nancy Pelosi said Barr's summary, which cleared Trump of campaign collusion with Russian Federation and criminal obstruction of Mueller's federal probe, was "condescending" and "arrogant". But Barr and his deputy Rod Rosenstein have concluded that "the evidence is not sufficient" to charge Trump with obstruction. The development comes a week after six Democratic congressional chairs wrote Barr to demand the almost 400 page report be released "in full and unredacted" by 2 April.
Those include grand jury material, information that would compromise sensitive sources and methods; information that could affect ongoing investigations, including those referred by Mueller's office to other Justice Department offices and information that could infringe on the personal privacy and reputation of "peripheral third parties".
President Trump went on to repeat his claim that the report was a "total exoneration, complete vindication" - an expression which has jarred with some, given that Mr Mueller's report explicitly stated that investigators were unable to exonerate the president of obstruction of justice. "We are preparing the report for release, making the redactions that are required".
Other congressional allies and informal Trump advisers, including former House Speaker Newt Gingrich and ex-New Jersey Gov. Chris Christie, have counseled against pardoning anyone ensnared in Mueller's investigation.
"My March 24 letter was not, and did not purport to be, an exhaustive recounting of the Special Counsel's investigation or report", he wrote.
Melville House plans no analysis, saying the report should be seen "as is".
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"If there were no evidence of conspiracy and no evidence of obstruction, the attorney general would have told us so".
'We know that the Russians through an intermediary offered dirt on Hillary Clinton as part of what was described as the Russian government effort to help Donald Trump.
However, just because Trump didn't directly conspire with a foreign power to steal an election doesn't make him an innocent in general.
"The American people need to be able to see Mueller's report", Gabbard said in the video, but she emphasized that "we should all be relieved" Mueller did not recommend charging Trump with a criminal offense.
"Everyone will soon be able to read it on their own", Mr Barr said. "Congress and the American people need the full story about what happened in 2016", said Senator Mark Warner, the senior Democrat on the Senate Intelligence Committee.
To date, only Barr's team at the Justice Department have actually read Mueller's report as the attorney general decides what portions, if any, of the almost 400-page document he will keep from public view.
In his letter, Mr Barr said he would be prepared to testify before the Senate and House judiciary committees on May 1 and May 2 respectively.
The heated, partisan back-and-forth at times overshadowed an intelligence hearing meant to discuss Russia's election interference in 2016 and ongoing threats to the United States.
He went through a litany of evidence that he said suggested collusion, including Trump's calls for Russians to hack Democrats' emails; Donald Trump Jr.'s and Jared Kushner's meetings with Russian officials, and their decision not to go to the Federal Bureau of Investigation afterward.