Asked whether Mr Mueller should recuse himself from the inquiry because of his friendship with Mr Comey, Mr Trump said: "Well he's very, very good friends with Comey which is very bothersome".
Investigators are looking into what Russia did to try to tip the 2016 U.S. presidential election in Trump's favor, and whether Trump's campaign colluded with Russian officials in that effort.
The former head of the Federal Bureau of Investigation testified before a Senate committee that Trump had asked him to drop a probe into former national security adviser Michael Flynn's alleged ties to Russian Federation.
"Well, it wasn't very stupid", Trump replied, and then went on to imply that Comey was forced to tell the truth because of the threat of tapes.
The President also addressed the nonexistent tapes of his conversations with Comey.
The report, based on interviews with more than three dozen current and former senior officials from the White House, the State, Defense and Homeland Security departments, and us intelligence services, details the Obama administration's response to the Russian assault in their final five months in office.
Saudi-Qatar rift: Pakistan sends emphatic signals of neutrality
It was also meant to have a security component, with a defense council to coordinate military matters. Most likely, Qatar will make some concessions to return to the fold.
Kiwis pedaling toward possible America's Cup upset
Spithill, an Australian, crossed the starting line a split second too soon and had to drop two lengths behind Team New Zealand. Races seven and eight are scheduled for Monday (NZT) where similar wind speeds of 8-10 knots are forecast.
Gal Gadot paid the same as Henry Cavill in superhero
But they have had difficulty establishing themselves in roles traditionally claimed by male actors such as action heroes. The film is lacking in racial diversity, but it does wonders with its use of a female lead in the superhero genre.
We live in perilous times - times that demand fidelity to first principles.
Mueller is investigating whether Trump obstructed justice by firing Comey last month after asking him to scale back the FBI's Russian Federation probe.
However, Mr Trump did call Mr Mueller an "honourable man".
Comey also testified that Trump asked him for "loyalty" - which Trump emphatically denies. "Lordy, I hope there are tapes", Comey said of the possibility of being recorded. They played pivotal roles in a 2004 White House confrontation and have spoken warmly of each other over the years, with Comey describing Mueller as "one of the finest people I've ever met".
"Big news today, you didn't-you said you didn't tape James Comey", said Fox's Ainsley Earhardt.
That hasn't stopped President Donald Trump and his associates from repeatedly trying to draw unflattering attention to their relationship, insinuating a personal bond they suggest could disqualify Mueller from credibly serving as special counsel in charge of the Russian Federation investigation. "And if you look further back, before he heard about that, I think maybe he wasn't admitting that so, you'll have to do a little investigative reporting to determine that".
Trump's tweets on Thursday raised questions about why the president would have staked his reputation and political capital on promoting something that wasn't real. So you never know what's out there, and I didn't tape and I don't have any tape and I didn't tape.
The NBC News/Wall Street Journal poll found 45 percent of respondents said they were more likely to believe Comey's version of events from his June 8 testimony to the US Senate, as opposed to 22 percent who are more likely to believe the commander-in-chief.