The future of Rosenstein, the deputy attorney general, came under doubt Friday when Trump attacked him in a tweet and a United States official confirmed that Rosenstein has told colleagues he may have to recuse himself from the inquiry because he'd criticised James Comey in a memo before Trump fired the former Federal Bureau of Investigation director.
Newsmax CEO Chris Ruddy, a friend of the President, said earlier this week that Trump was considering firing Mueller, who has been appointed to investigate Russia's influence on the 2016 presidential election.
The memos - first cited by the New York Times last month - said Trump told Comey in February to end the bureau's investigation into former National Security Adviser Michael Flynn's Russian Federation connections.
Is there anyone out there who is actually surprised that special counselor Robert Mueller would be looking into whether President Trump attempted to obstruct justice in connection with the Russian Federation probe?
Recent news reports have suggested Mr Trump sought all three officials' help in pressuring Mr Comey to drop his investigation into former national security adviser Mike Flynn.
President Donald Trump acknowledged on Friday he is under investigation in a probe of alleged Russian meddling in the 2016 USA presidential race and possible collusion by his campaign - and seemed to assail the Justice Department official overseeing the inquiry. "I can go around them", the tweet read. And allies of former President Bill Clinton also raised concerns of political bias by Kenneth Starr, who led the Whitewater investigation that ultimately led to Clinton's impeachment.
Trump also lashed out at the media on a day that aides had hoped would be focused on his decision to undo some of former President Barack Obama's detente with Cuba.
The debate was then on as to whether or not Trump should be charged with obstruction of justice.
Feinstein said the president has no authority to fire Mueller.
President Trump needs to get both his act and his story together. Trump has expressed increasing dissatisfaction with the Justice Department since Mueller's appointment.
In a series of statements on Twitter on Thursday, Mr Trump repeated his claim that Mr Mueller's investigation is a "WITCH HUNT" based on the "phony" premise of possible collusion between Russian Federation and a cadre of Trump campaign associates.
The tweet on Friday was the first official confirmation by Trump that he himself is under investigation. Rosenstein testified under oath this week that he would not fire Mueller without good cause and that none exists.
Thursday, Trump griped he was receiving unfair treatment from investigators compared with his election opponent, Hillary Clinton.
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