Trump made the comments in a series of early morning tweets after his highly criticized meeting with Russian President Vladimir Putin in Finland and his visit with North Atlantic Treaty Organisation countries.
"I accept our intelligence community's conclusion that Russia's meddling in the 2016 election took place", Trump conceded Tuesday.
"The sentence should have been, 'I don't see any reason why it wouldn't be Russia.' Sort of a double negative", the president said.
The political firestorm over Trump's performance at the Helsinki news conference has engulfed the administration and spread to his fellow Republicans, eclipsing most of the frequent controversies that have erupted during Trump's turbulent 18 months in office.
On Tuesday, however, Trump backtracked and claimed that he had misspoken - that he had, in fact, meant to say that he did believe that Russian Federation had interfered in the election.
"Putin and I discussed many important subjects at our earlier meeting".
Some US lawmakers have suggested passing resolutions voicing support for intelligence agencies, or spending more to enhance election security and prevent cyber attacks.
"Oops, they just turned off the light", Trump joked.
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Coats said last week that Russian Federation has been the most aggressive cyberthreat but other efforts are coming from China, Iran and North Korea as well as criminal networks and individual hackers.
Trump said: "All I can do is ask the question".
Mark Levin slammed "psychopaths" in the media for the "overwrought, hysterical, insane" criticism of President Donald Trump following his summit with Russian President Vladimir Putin. Trump never admits he was wrong, so his attempt at a do-over yesterday - saying he meant to say he didn't see a reason why Russian Federation "wouldn't" have interfered in the election, instead of "would" - is an indication that even he realizes he finally hit the wall.
Some lawmakers said they would seek remedies against Russian Federation in Congress.
"I think there's a lot we can do together", the Senate's No. 2 Republican, John Cornyn of Texas, responded. "This is about the Russians undermining the U.S., not about Donald Trump".
It came as the fallout grew over what was dubbed Mr Trump's "surrender summit" and "treason summit". Lawmakers called his comments shameful and a disgrace to the USA presidency.
"Look, you need to have a strategy, and I don't think he should be doing one-on-one meetings with heads of state because too much is at stake", Hurd said Tuesday on CNN's "Anderson Cooper 360".
But he also said that "other people" could have been involved, a statement echoing past remarks casting doubt on Russia's role.