The Kremlin’s role in the death has come under scrutiny in recent days, with former FBI Director James Comey and former national security adviser Michael Flynn testifying before the House Intelligence Committee.
Both have acknowledged that Russia meddled in the election and sought to help Trump defeat Clinton.
But they have not directly addressed whether Trump himself may have been responsible.
On Monday, Comey testified that he believed Trump was “probably aware” of the ambassador’s death.
In a tweet on Tuesday, Trump dismissed the news of the investigation as a “fake news story” and said the president “never asked me to fire Comey.”
But he also made clear that he would not rule out the possibility of firing the special counsel.
Trump also made a point of saying he was not asking Comey to resign, though he acknowledged that he did so.
“He is a man of honor, and he’s a very, very honorable man,” Trump said.
“And I think it’s a shame that he’s had to go through all this.
But I will tell you this, the way I see it, that was a very unfair thing that was done to him, and it was very unfair.”
Trump’s comments came after Vice President Mike Pence testified before the Senate Intelligence Committee on Tuesday.
Pence told senators that Trump “talks to Russia on a daily basis.”
Pence said that the president told him that Trump did not fire Comey.
“I think it would be unfair to the president to suggest that I didn’t have any interaction with the president or his campaign,” Pence said.
Pence said he had also spoken with Trump about the investigation and that he believes the president would be “very, very upset” if he was forced to resign.
“As I have said repeatedly, I have no reason to doubt the integrity of the process that was followed and the outcome of the Russia investigation,” Pence told the committee.
The president also accused Comey of lying to the Senate in a tweet Tuesday night.
“James Comey better hope that there are no ‘tapes’ of our conversations before he starts leaking to the press,” Trump tweeted.
Comey told lawmakers that he was told by Trump to get rid of Comey, and that they had a discussion about that shortly before Comey’s firing.
Comey has said the President told him to get out of the way of the FBI probe.
“At the time I did, I was told to get him out of there, or I would be fired,” Comey told senators on Tuesday on Capitol Hill.
Comey said that he then made his decision not to file a letter of resignation.
“After that, the President asked me directly if I would resign,” Comey said.
In response to Trump’s tweet, Sen. Joe Manchin (D-W.
Va.) tweeted that “a letter to the President is not a way to make your case to your boss.”
Manchin added that “I do not know the details of the conversation that Mr. Comey had with the President.”
The Republican-led House Intelligence committee will hold a hearing Tuesday on the probe into Russian interference in the 2016 election.