"Late on Friday, Trump shared a post from Twitter user @surfermom77 which names the alleged whistleblower. Trump's camp has been trying to push the name in public for months, in an apparent attempt to discredit and attack the whistleblower. The whistleblower's identity has not been verified, and little is known about them other than the fact they are a member of the intelligence community", reads the story.
In summer 2019, the individual referred to as the whistleblower claimed that "White House officials had been "deeply disturbed" by a phone call between Trump and the president of Ukraine, during which Trump pressured his counterpart to open an investigation into former Vice President and election rival Joe Biden", as Business Insider put it.
The whistleblower assumed that Trump's administration had tried to cover it up.
Some media assumed that Trump might have deleted his retweet, as certain Twitter users could not reach it; however, later, the U.S. leader himself explained that "the site had experienced an outage that meant certain tweets were visible to some users and not to others".