During CNN's live stream of his speech, a headline read: "Without any evidence, Trump says he's being cheated."
"Trump complains that mail-in votes are being counted," another headline read.
A fox news headline read: "Trump alleges fraud, attempts to "rig" election."
Major US networks also choose to cut away from Trump mid-speech.
NBC, CBS and ABC News all cut away from the President's first speech after election night, during which he declared: "If you count the legal votes, I easily win."
CNN and Fox News carried the full remarks.
A gobsmacked CNN reporter Anderson Cooper called the current President an "obese turtle on his back flailing in the hot sun".
"That is the President of the United States. That is the most powerful person in the world, and we see him like an obese turtle on his back flailing in the hot sun, realising his time is over," Cooper said after Trump's Thursday evening press conference.
"He just hasn't accepted it and he wants to take everybody down with him, including this country."