The memo comes as U.S. Vice President Mike Pence's office said he had hired a lawyer, known for defending government officials in high-profile investigations, to help him with the probes into the alleged Russian interference and possible ties to the Trump campaign.
Trump did not specify who he was referring to, but he appeared to be questioning the integrity of Deputy Attorney General Rod Rosenstein, the U.S. Justice Department's No. 2 official. In the interview Trump did with NBC's Lester Holt shortly after firing FBI Director James Comey, Trump described Rosenstein's involvement in the firing.
Trump advisers and confidants describe the president as increasingly angry over the Russian Federation investigation, yelling at television sets in the White House carrying coverage and insisting he is the target of a conspiracy to discredit - and potentially end - his presidency.
According to his tweet, he is being investigated by the man who told him to fire James Comey.
Iran Capture and Kill ISIS Members Responsible for Terrorist Attack Last Week
The four-minute video shows three masked men sitting on a floor holding automatic rifles. The speaker claims to represent the "first battalion" of IS formed inside of Iran.
"He (Trump) is not afraid of the investigation - there is no investigation", Sekulow said, stressing that "there is not an investigation of the president of the United States, period".
Mark Corallo, a spokesman for Trump's personal lawyer, responded Wednesday evening to the Post report by saying: "The FBI leak of information regarding the president is outrageous, inexcusable and illegal".
Trump made similar comments about Comey in the weeks leading up to his dismissal.
Reports have been mounting that Mueller is investigating Trump for potential obstruction of justice related to his firing of Comey. "Nice", Trump wrote in his first tweet.
In an early-morning tweetstorm, Trump blasted the investigation as a "witch hunt" and a "phony story".
Faced with a Russia investigation that appears to be broadening, Mr. Trump appears eager to use Twitter to undermine the credibility of the inquiry and to convince his supporters that they do not need to worry.USA media also reported that members of President Trump's transition team were ordered to preserve documents and other materials related to the investigation of Russian interference. Rep. Adam Schiff, the top Democrat on the House intelligence committee, said that the panel - overseeing one of several congressional investigations - is looking forward to getting a response from the White House on whether recordings exist. The tweet in question was the last of four tweets Trump sent out about the investigation.