Trump made these remarks at a news conference, his first after winning the elections, at Trump Tower in NY which was dominated by reports USA intelligence chiefs had told the president-elect about Russian Federation possessing damaging information on him.
'If [Russia] had something, they would have released it, ' he claimed.
The synopsis was reportedly attached as an appendix to the intelligence community's report on alleged Russian interference in the 2016 presidential race.
Cohen was one of a handful of close Trump associates who appeared in the secret profile, which was the subject of multiple press reports on Tuesday.
CNN later offered a statement, trying to distance its reporting on the dossier from BuzzFeed, accusing Trump of deflecting from the allegations in their own story and challenging his team to identify anything that was inaccurate.
Mr. Clapper said in the statement that in his conversation with Mr. Trump, he "emphasised that this document is not a US intelligence community product" and that he did not believe that its leak came from his officials.
But there's still no compelling public evidence that the claims are true.
It said the FBI is investigating the credibility and accuracy of these allegations, which are based primarily on information from Russian sources, but has not confirmed many essential details in the memos about Trump.
He called the claims published by U.S. media outlet Buzzfeed and attributed to a former British intelligence operative a "total fake" and "an obvious attempt to harm our bilateral relations".
Trump began the press conference by actually praising the rest of the media who did not report about the salacious allegations.
"In this case, the document was in wide circulation at the highest levels of American government and media", he added. Nor had anyone else.
The format of the event in the lobby of Trump Tower in NY resembled a campaign rally more than a news briefing. "My view is that these are serious matters and that they should be investigated".
But the timing is especially interesting.
"Russian-US relations in 2017 will start to melt", reports euronews' Galina Polonskaya from Moscow.
"Russia just said the unverified report paid for by political opponents is 'A COMPLETE AND TOTAL FABRICATION, UTTER NONSENSE.' Very unfair!" he wrote on Twitter.
USA intelligence officials have not verified the dossier's details, however, and it remains unclear how reliable they are. Other news outlets withheld publishing most details about the unverified claims because they couldn't confirm them.
"I didn't publish all of the memos because the allegations in them couldn't be confirmed, and I couldn't confirm the FBI was mounting a thorough investigation of these allegations", David Corn, my ex-boss and the author of the piece, told me Tuesday.
In any case, he told reporters it was "disgraceful that the intelligence agencies let any information that turned out to be so false and fake to get out".