It has since been handed off to special counsel Robert Mueller.
"Of course we have to see [the report] before it goes to Congress", he said. "The only way we can assert it is if we see what is in the report".
According to former law-enforcement officials and others familiar with the probe, the newspaper said, counterintelligence agents had to decide whether Trump's actions posed a possible national security threat.More news: Details Over Top Sanders Advisor's Alleged Sexual Misconduct With Subordinate Emerge
National security attorney Bradley Moss wrote that it was "arrogantly moronic" to think "the subject of an investigation gets to "correct" prosecutor's findings".
It's not clear whether the report will ever be released publicly.
One aspect of that investigation - whether Trump's firing of Comey represented obstruction of justice - has been previously reported. Mr. Whitaker in the past criticized the scope of the Mueller probe and brought up the possibility of undermining it by slashing the investigation's funding.More news: Women Develops Rare Condition That Leaves Her Unable To Hear Men
During the interview with The Hill, the former New York City mayor made light of Trump's former personal attorney Michael Cohen's intention to testify in public before the House Oversight and Reform Committee on february 7. "I have no concerns about Cohen at all because I can prove with very little effort that he is a total, complete and absolute liar", he told The Hill.
"The New York Times" claims the investigation - a dual counterintelligence and criminal probe - was launched after the president fired FBI director James Comey in May 2017. But, added to everything already known about contacts between Trump associates and Russian individuals - all of which were initially denied - this raises multiple red flags. "We weren't convinced they had any questions they don't know the answer to".More news: Poland Charges Chinese Huawei Manager for Espionage
"In the days after President Trump fired James B. Comey as F.B.I. director, law enforcement officials became so concerned by the president's behavior that they began investigating whether he had been working on behalf of Russian Federation against American interests, according to former law enforcement officials and others familiar with the investigation", The Times reports.