The former director of National Intelligence said that the intelligence community's conclusion that Russians sought to influence the 2016 election "cast doubt on the legitimacy" of President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's victory.

"Our intelligence community assessment did, I think, serve to cast doubt on the legitimacy of his victory in the election," James Clapper said in a CNN interview on Friday night.

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Clapper oversaw the January report that concluded, in a consensus between the CIA, NSA and FBI, that Russia carried out a deliberate and multifaceted attempt to influence the 2016 U.S. presidential election.

The report found convincing evidence that Russia had specifically worked to aid Donald Trump in winning the presidency.

While the report did not find evidence that Russians had actually influenced the results of the election, Clapper said that he thinks that implication concerns Trump more than anything else.

"And I think that above all else is what concerned him, and I think that transcends, unfortunately, the real concern here, which is Russian interference in the political process, which by the way is going to continue," Clapper said.

Trump has repeatedly dismissed reports of Russian attempts to influence the election, referring to the investigations into Russian meddling on Friday as a "hoax," and accusing the media of biased coverage.

The Russia hoax continues, now it's ads on Facebook. What about the totally biased and dishonest Media coverage in favor of Crooked Hillary? — Donald J. Trump (@realDonaldTrump) September 22, 2017

Clapper said that when they briefed the president on the report in January, Trump was "very solicitous, courteous, even complimentary. And he did listen. Frankly, the evidence that we provided in detail, which of course we couldn't expose publicly, was pretty overwhelming."