"As I said forth in the report after that investigation, if we had had confidence that the President clearly did not commit a crime, we would have said so," Mueller said during brief remarks at the Justice Department.
"The Special Counsel's Office is part of the Department of Justice and by regulation, it was bound by that department policy," Mueller told reporters at the Justice Department.
"Attorney General Barr has deliberately misrepresented key aspects of Mueller's report and decisions in the investigation, which has helped further the president's false narrative," Representative Justin Amash wrote on Twitter.
Robert Mueller is a "man of great rectitude and apolitical, and he doesn't want to participate in anything that he might regard as a political spectacle," Jerrold Nadler, chairman of the House Judiciary Committee, said.
Former federal prosecutor Jack Weiss compared Michael Flynn's voicemail recording to Trump's "Access Hollywood" tape in 2016. "If we get a live tape, I think it'll be a big deal," he said.
In a letter to House Judiciary Committee Chairman Jerrold Nadler, White House counsel Pat Cipollone said the administration would refuse to turn over documents and provide testimony from dozens of current and former Trump officials.
"Considering that we have met over the past two weeks for two times, that's a reason for some optimism," Russian Foreign Minister Sergey Lavrov told Secretary of State Mike Pompeo.
The veteran journalist said the situation challenged "whether our institutions are able to function in this country to deal with a president of the United States who is unique in our history, who has nothing but contempt for Democratic traditions and the rule of law."
"It was misleading, disingenuous and deceptive," former judge Andrew Napolitano wrote about William Barr's summary.
"He will come at some point. If necessary, we'll subpoena him, and he will come," said the House Judiciary chairman.
"He certainly had read the newspaper reports of the complaints and he had a letter from Mueller himself complaining," Andrew Napolitano, a former judge, said.
"It seems that individuals in the Justice Department at the highest levels who seem to state the facts and the law as they exist seem to not do well," said former Deputy Assistant Attorney General Elliot Williams.
Democrats "are now in a psychotic rage and it keeps spinning over and over again in their little liberal brains," Hannity said.
The president's foreign policy is "totally at odds with what the U.S. intelligence community believes," Jeremy Bash argued.
"Are they looking for a redo because they hated seeing the strong NO COLLUSION conclusion? There was no crime," the president insisted on Twitter.
A member of the House Judiciary Committee said Special Counsel Robert Mueller had reached a tentative agreement to testify in front of the panel on May 15, but then walked that claim back only hours later.
"We had a clear directive to preserve those documents, preserve emails, preserve text messages," Omarosa Manigault Newman said.
"It's time to investigate the beginning of the coup and who in the DOJ, FBI and White House signed on to prevent and overturn the will of the American people. Grab your popcorn, folks. It's showtime," Pirro said.
As a result of discrepancies between claims made by the attorney general and a letter from the special counsel, Graham is now offering Mueller the chance to testify.
White House special counsel Emmet Flood wrote a letter of complaint about the "political" Mueller report to Attorney General William Barr after it was made public.
Barr has "a very narrow, almost Jesuitical, understanding of the law" former judge Andrew Napolitano explained.
"That's banana republic stuff! That is North Korea. That is Russia. That is China. What separates us from the rest of the world ... is our respect for the rule of law," former Senator Claire McCaskill said. "And this guy is trampling all over it!"
The attorney general has said he doesn't object to Mueller testifying—and his own testimony made it clear why the special counsel should speak.
Former judge Andrew Napolitano said that the attorney general "was splitting hairs" in trying to explain his previous testimony to Congress.
"I'm not in the business of determining if lies were told to the American people," Attorney General William Barr said. "I'm in the business of determining if crimes were committed."
Special counsel Robert Mueller's work "concluded when he submitted the report to the attorney general," Barr told Senate lawmakers on Wednesday.
"What we are seeing is anyone that gets close to Donald Trump becomes tainted by that experience," Representative Adam Schiff said.
"He had a problem with the media coverage, not the summary," Ainsley Earhardt said.
Former CIA Director John Brennan said the attorney general's behavior suggests "he is acting as Donald Trump's personal lawyer."
Attorney General William Barr's appearance follows the disclosure that special counsel Robert Mueller wrote a critical letter about the attorney general's summary of his Russia probe report.