President Trump unleashed a Twitter tirade Saturday morning in a response to a bombshell New York Times' story Friday night, which reported that the FBI opened an investigation into whether Trump was secretly working for Russia after he fired James Comey in May 2017.

Wow, just learned in the Failing New York Times that the corrupt former leaders of the FBI, almost all fired or forced to leave the agency for some very bad reasons, opened up an investigation on me, for no reason & with no proof, after I fired Lyin’ James Comey, a total sleaze! Funny thing about James Comey. Everybody wanted him fired, Republican and Democrat alike. After the rigged & botched Crooked Hillary investigation, where she was interviewed on July 4th Weekend, not recorded or sworn in, and where she said she didn’t know anything (a lie), the FBI 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). My firing of James Comey was a great day for America. He was a Crooked Cop

Reality check: Trump's assertion that the FBI opened an investigation of him "for no reason & with no proof" is false. According to the Times, the FBI had its suspicions during the campaign about Trump's relationship with Russia, but only formally opened an investigation after two key moments in which Trump explicitly tied the Comey firing to his desire to end the Russia investigation.

Go deeper: FBI probed whether Trump was secretly working for Russia in 2017