CNN said its report was based on a two-page USA intelligence synopsis that was shared last week with President Barack Obama, legislative leaders and Trump himself, although those details were held back from the unclassified public briefing.
CNN also reported that as of Monday evening Trump's transition team has refused to comment on the story, as did the Federal Bureau of Investigation and the Director of National Intelligence.
Obama urged Trump and Congress to strengthen the nation's cybersecurity and prevent any more foreign interference in USA elections.
As was made clear in a recent report from the intelligence community, Comey confirmed that Russian Federation deliberately engaged in cyberattacks to help Hillary Clinton's campaign and to bolster Donald Trump's chances of securing the presidency.
CNN did not detail the specific allegations included in the memo because the network has not yet independently confirmed them.
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Obama said he and Trump are opposite in many ways but that they have one big thing in common - confidence.
The Russian government is dismissing the US intelligence report substantiating Moscow's alleged meddling in the USA presidential election as "unfounded" and "reminiscent of a witch-hunt".
In late October, Comey angered Democrats when he announced 11 days before the election that the FBI was looking at more emails as part of its investigation of Hillary Clinton, who then lost the presidential election to Trump. Sessions, who was picked by Trump to be his attorney general, said he was not aware of the report and had no contacts with the Russian government. The Trump transition team has not answered requests for comment from IBTimes UK. "The Fisa court turned down the application asking FBI counter-intelligence investigators to narrow its focus".
"You should let everybody know in America, Republicans and Democrats, that you're going to make Russian Federation pay a price for trying to interfere", Graham said.
The reports emerged the night before Trump was scheduled to hold his first news conference since winning the election.
The Obama administration and the intelligence community clearly and rightly don't trust Trump to do investigate the Russian hacking.