US President Donald Trump announced Friday that he is banning CNN, MSNBC and Politico from the White House, effective immediately, in the latest escalation of his administration's conflict with the American press.

Trump made the announcement in a lengthy post on Truth Social, accusing the outlets of fabricating their coverage of his administration. He provided no specific examples of reporting that prompted the decision.

"I am proud to announce that, effective immediately, I am banning Fake News CNN, MSNBC from the White House as a result of their constant 'reporting' FAKE NEWS!" Trump wrote.

"Media Outlets shouldn't be able to constantly write or report FICTION and LIES when they're covering the President of the United States, the Trump Administration, or the United States of America. Other Fake News Media Outlets to follow."

It remains unclear what the ban would entail in practice, including whether journalists from the affected outlets would be physically barred from White House grounds. Reporters from both CNN and Politico were still present on the premises shortly after the announcement was made.

The move is expected to face legal challenges from the outlets involved and from press freedom organisations. Legal analysts note that the First Amendment to the US Constitution limits the government's ability to restrict press access.

Trump's announcement is the latest in a series of confrontations with the White House press corps since he returned to office in January 2025.

In February, the administration announced it was taking back control of the press pool, which had been managed by the White House Correspondents' Association for more than a century.

That same month, the administration barred Associated Press reporters and photographers from restricted-access spaces, including the Oval Office and Air Force One, over the outlet's continued use of the term "Gulf of Mexico" rather than "Gulf of America." The Associated Press filed a lawsuit in response, and that case remains ongoing.

Trump has also pursued legal action against a number of other US and international news organisations, including the Wall Street Journal, the New York Times and the BBC.

The president has frequently clashed with reporters in the Oval Office and aboard Air Force One, regularly referring to journalists as "fake news" and "rude."