The authorities are not yet aware of the motive behind the fatal attack, which took place at around 2:30 a.m. on Tuesday.
"The Russians are absolutely intent on trying to interfere with our elections through foreign influence," Christopher Wray said.
"We will build an ironclad case to act," Pelosi said, holding off calls for impeachment.
"He is basically nothing more than a political hatchet man trying to come out and say there was no obstruction of justice. All he's doing is making things up and essentially not following the law," one former federal prosecutor told Newsweek.
"Take the word impeachment away. It's a losing word," he said. "It's a 30-year-old word that does not help us."
President Donald Trump's personal attorney Rudy Giuliani echoed his client's criticisms of Fox News senior judicial analyst Andrew Napolitano on Thursday.
"After two years, the Special Counsel is moving on with his life," Sanders' statement read. "And everyone else should do the same."
"It contains our findings and analysis, and the reasons for the decision we made. We chose these words carefully, and the words speak for itself," Mueller said.
"Some of the president's actions were inherently corrupt. Other actions were corrupt—and therefore impeachable—because the president took them to serve his own interests," Amash wrote.
"Many privately expressed concerns about what was in the Mueller report, in part because of the gap between what Attorney General [Bill] Barr characterized as being in the report," Senator Chris Coons said.
The president "would fall apart if (Melania) ever said, 'Donald, there's nothing keeping me here,'" Maher said.
"It was misleading, disingenuous and deceptive," former judge Andrew Napolitano wrote about William Barr's summary.
"Rudy Giuliani would have indicted someone who committed the acts that are put out in the Mueller report in a heartbeat," his ex-assistant said.
"In leaving Barr—who lacks the independence that the special counsel role was designed to preserve—to render judgment on the evidence and the law, Mueller abdicated his duty," attorney David Kendall argued.
More than 375 former government workers and appointees said that only Donald Trump's being president saved him from being charged with obstruction of justice.
The move came after the attorney general failed to provide the committee with a response by the 9 a.m. Monday deadline set by Judiciary Chairman Jerrold Nadler, who issued a subpoena for the full Mueller report and its underlying evidence.
"Stop it with the garbage, Rudy," George Conway tweeted at Giuliani.
The Russian president "knew there was no collusion whatsoever," Donald Trump told reporters after their phone call.
"God Bless this great nation where we cherish the freedom of religion," the first lady tweeted.
Just three Democrats, Sens. Doug Jones (D-Ala.), Joe Manchin (D-W.Va.) and Kyrsten Sinema (D-AZ), voted for Barr's confirmation in February, and now, most of them are experiencing some regret.
"Democrats only disgrace and humiliate themselves with their baseless attacks on such a fine public servant," Sanders tweeted.
Though special counsel Robert Mueller did not indict the president, federal prosecutors in the Southern District of New York are still investigating matters related to him.
"Accomplished people lacking inner strength can't resist the compromises necessary to survive Mr. Trump," Comey wrote.
Appearing before the Senate Judiciary Committee, the attorney general testified that President Donald Trump cooperated with the special counsel's investigation.
"Mueller's letter shows that Attorney General Barr has always been the chief propagandist for President Trump. His four-page letter totally misled Congress and the public," said Senator Chris Van Hollen on Twitter. "He should resign immediately."
South Carolina Senator Lindsey Graham said that while President Trump did nothing wrong in regards to 2016 election interference, he still believes the Russian meddling "is a big deal" worthy of increased sanctions.
"The obstructer need not succeed in order to be charged with obstruction," analyst and former Judge Andrew Napolitano wrote. "On obstruction, Barr is wrong."
"I think the investigations and all the speculation that's happened for the last two years has had a much harsher impact on our democracy than a couple of Facebook ads," White House adviser Jared Kushner said.
The Kremlin said that "in a similar situation our Audit Chamber would've certainly probed into what the taxpayers' money has been wasted on," but "it's up to the U.S. taxpayers to ask such questions."