"Opened Inquiry Into Whether Trump Was Secretly Working On Behalf Of Russia" and suggested that the firing of former FBI Director James Comey had inspired such doubt in others within the agency that they began digging for connections between Trump and Russia.
Trump said it was the "most insulting" question he'd ever been asked.
The report of the inquiry published in the New York Times was based on the testimonies of former USA law agents, and others involved in the case.
President Trump addressed the Post's reporting during an on-air phone call with Fox News host Jeanine Pirro and denied the allegations.
Trump responded, "I think it's the most insulting thing I've ever been asked".
She pointed out that the investigation was looking into whether the president was "actively working for Russia" and asked, "Are you now or have you ever worked for Russia, Mr. President?"
Trump, chose to respond to the reports on Twitter, beginning his comments by calling the New York Times "failing".
Warner is a member of the 'Gang of Eight, ' a bipartisan group of senior lawmakers from the House and Senate who receive classified intelligence briefings from the White House.
"Trump continued in a quartet of follow up tweets, ".the Federal Bureau of Investigation was in complete turmoil (see N.Y. Post) because of Comey's poor leadership and the way he handled the Clinton mess (not to mention his usurpation of powers from the Justice Department).
Russian Federation has denied interfering, and Trump has said repeatedly there was no collusion between his campaign and Moscow.
Lawyers: Manafort suffers from depression, anxiety - 1/8/2019 12:38:57 PM
For the two charges he now faces in DC federal court, Manafort could receive 17 to 22 years in prison, his plea agreement says. Manafort has pleaded guilty to conspiracy charges in Washington and faces sentencing in a separate case in Virginia.
Trump tweeted early Saturday that the report showed that the FBI leadership "opened up an investigation on me, for no reason & with no proof" after he had fired Comey. There have already been concerns by special counsel Robert Mueller that Trump's firing of Comey constituted an act of obstruction of justice. The Times says it's unclear whether Mueller is still pursuing the counterintelligence angle. "These people make it up", Trump said.
He and other Democratic senators said this report and others within the past week questioning Trump's behavior toward Russian Federation give new urgency to the need for the Mueller investigation to be allowed to run its course.
The spokesman talked to the Post on the condition of anonymity and said that following the 2017 Hamburg meeting that included Tillerson, the former secretary of state "gave a fulsome readout of the meeting immediately afterward to other USA officials in a private setting, as well as a readout to the press".
In the Fox News interview, Trump questioned why the newspaper made such a "big deal" out of his discussions with Putin in Helsinki last summer. "Anyone could have listened to that meeting".
"Every time Trump meets with Putin, the country is told nothing", Engel said in a statement.
The Times reported the counterintelligence probe was sparked in part by growing alarm about Trump's behavior, including comments he made suggesting he fired Comey over the Russian Federation investigation, which is now being led by Mueller.
Trump dismissed the notion in Saturday's interview, but without ever directly denying that he was working as a secret agent for Russian Federation.
On Thursday, U.S. Treasury Secretary Steven Mnuchin insisted that the Trump administration would keep tight control on companies linked to Deripaska, despite the decision to ease restrictions.
Warner predicted some Republicans in the GOP-controlled Senate would join Democrats in voting to override the removal of these sanctions.