President Donald Trump confirmed on Friday for the first time that he's being investigated for his role in firing Federal Bureau of Investigation director James Comey, calling the probe a "witch hunt".
A source familiar with the Mueller investigation confirmed the report, saying an examination of possible obstruction of justice charges was "unavoidable" given testimony by Comey, although the issue may not become the main focus of the probe.
The Washington Post reported this week that Special Counsel Robert Mueller was also investigating the president for possible obstruction of justice, citing unnamed sources, a development that Mr Trump appeared to confirm in his Friday morning tweet.
The Washington Post also claims that right after Comey gave this document to Mueller, Mr. Mueller then opened an investigation of President Trump on whether of not he obstructed justice in firing James Comey. However, several days later, in an interview with NBC News's Lester Holt, Trump contradicted his administration and cited "this Russian Federation thing" as the reason for Comey's sacking.
Rosenstein told senators this week that only he can fire special counsel Mueller - and he won't. Trump said on Twitter, appearing to refer to Deputy Attorney General Rod Rosenstein.
Donald Trump took to Twitter Friday to insist that despite months of investigating, no proof has emerged that he colluded with Russian Federation to tilt the 2016 presidential election in his favor.
The White House confirmed that Mueller was among the candidates Trump interviewed to replace Comey.
Mr Comey said he was "sure" Mr Mueller was looking at whether Mr Trump had obstructed justice, but added that to his knowledge, the president had not tried to impede the Russian Federation inquiry.
The Trump tweets come after the top lawyer for his transition team warned organization officials to preserve all records and other materials related to the Russian Federation probe.
On May 9, Trump summoned Rosenstein and Attorney General Jeff Sessions to the White House to discuss Comey, a meeting that ended with the president instructing the Justice Department leaders to put their criticism of Comey in writing.
Dianne Feinstein, top Democrat on the Senate Judiciary Committee, said she was "increasingly concerned" that Trump will fire both Mueller and Rosenstein. Sad!" Trump tweeted. "The Fake News Media hates when I use what has turned out to be my very powerful Social Media-over 100 million people!
Earlier this week, he wrote: "They made up a phony collusion with the Russians story, found zero proof, so now they go for obstruction of justice on the phony story".