President Donald Trump defended his company’s pursuit of business in Russia during his 2016 White House bid, saying that his dealings there were legal and that they ultimately ended without a project.
On Thursday his ex-lawyer had admitted lying to Congress about a property deal Mr Trump was planning in Moscow.
Cohen admitted that he lied when he said that negotiations for the skyscraper ended in January 2016, when in fact they continued until June that year, after Trump cinched the Republican nomination.
In a series of tweets, Mr Trump said the deals were “very legal”, he put up “zero money” and abandoned the project.
No hard evidence of any collusion between the Trump campaign and Kremlin has so far been produced and the president has continually railed against the investigation.
Mr Trump is currently in Argentina for the G20 summit and has called off a meeting with Russian President Vladimir Putin, citing Moscow’s seizure of three Ukrainian ships and their crews.
The president was continuing a defence that had begun on Thursday after ex-lawyer Michael Cohen had admitted one count of lying to Congress.
Cohen said he had submitted a false written statement about a Trump Organization plan to build a skyscraper in the Russian capital.
Simply put, Cohen admitted that negotiations over the project had continued far deeper into 2016, the election year, than he had told Congress and that his contacts with Mr Trump had been far more extensive.
On Friday, Mr Trump tweeted: “Oh, I get it! I am a very good developer, happily living my life, when I see our Country going in the wrong direction (to put it mildly).
“Against all odds, I decide to run for President & continue to run my business – very legal & very cool, talked about it on the campaign trail… Lightly looked at doing a building somewhere in Russia. Put up zero money, zero guarantees and didn’t do the project. Witch Hunt!”
On Thursday, Mr Trump had called Cohen “a weak person and not a very smart person”.
“He’s got himself a big prison sentence. And he’s trying to get a much lesser prison sentence by making up this story.”
He added: “He’s lying about a project that everybody knew about. I mean, we were very open with it.”
How does Cohen fit into the Russia investigations?
Until his latest admission Cohen, who once said he would take a bullet for the president, was more of a peripheral figure in the investigation into Russian collusion that is being overseen by special counsel Robert Mueller.
Mr Mueller has already brought criminal charges against a series of former Trump aides and associates, including Mr Trump’s former national security adviser Michael Flynn, Russian individuals and entities.
The main thrust has been whether Russian agents sought to undermine the campaign of Hillary Clinton and whether the Trump team played any part.
Cohen’s testimony has highlighted the president’s business empire and the extent of its Russian links. Mr Trump has continued to insist he had no financial ties to Russia.
Mr Trump has now himself provided written testimony to Mr Mueller. The BBC’s Anthony Zurcher in Washington says it is now sure to be cross-referenced with Cohen’s latest testimony and could provide a political or indeed legal headache for the president.
Cohen has already pleaded guilty to eight criminal charges, including tax evasion, bank fraud and campaign finance violations.