Yet they still weren't satisfied. AP is the largest and most trusted source of independent news and information.
He says that's why he believes Congress needs to keep conducting its investigations which are meant for the public.
The No. 2 Senate Republican, John Cornyn of Texas, said he was supportive of investigations in Congress but expressed concern about the "proliferation" of hearings.
"The political reason on the Democratic side is obvious: It's to namely keep this issue going and to keep it ideally going into the 2018 elections and, even more, into the presidential elections of 2020", he said.
Despite initially opposing appointment of an independent counsel, Republican House Speaker Paul Ryan said Thursday that the development "helps assure people and the Justice Department that they're going to go do their jobs independently and thoroughly, which is what we've called for all along".
"Sometimes you have to be careful what you ask for, because when you get it, all of a sudden you can't get answers to things because now it's an active investigation", he said. "With all of the illegal acts that took place in the Clinton campaign & Obama Administration, there was never a special counsel appointed!"
Rep. Adam Schiff of California, the top Democrat on the House Intelligence Committee, concurred.
"He knew the day before", Durbin said of Rosenstein.
Chances that such a commission, or a special committee, will be created have dimmed enormously thanks to the Mueller appointment.
Fighting back against multiple crises has consumed much of the political oxygen inside the White House, leaving Trump's agenda in doubt.
"Some people don't want the story to die, right? That is politics", said Sen. "Mr. Mueller will tell us what we can get and what we can't".
At the same time, congressional committees are continuing their own investigations, leading to some turf warfare and sniping as the Senate Intelligence Committee and the Senate Judiciary Committee both sought to lay claim to testimony from Comey, while the House Oversight Committee also hoped to hear from the former director.
"If there is obstruction of justice, perjury or false statements made in connection with that investigation", Zeidenberg said.
Trump later said in an interview with NBC News last week that he had chose to fire Comey "regardless of the recommendation" from the Justice Department.
Flynn Subpoena Burr, the Senate intelligence panel's chairman, said members are awaiting word from Flynn's attorneys whether he will comply with a subpoena for his records.
Cato's Pilon said Mueller's investigation would determine whether the facts in the investigation warranted prosecution. They have no problem slamming him. Many lawmakers from both parties welcomed the appointment of Mueller by Deputy Attorney General Rod Rosenstein as a way to restore confidence in government institutions and bring order to the probe. North was granted congressional immunity to testify, a move that ultimately hurt the court case against him.
Democrats disagree. Virginia Sen.
"You're overthinking this", Risch said when asked about any precedent. But, he added, "you have to put your head down and fight, fight, fight".