President Trump said Friday, in a Truth Social post, that he is banning CNN, MS NOW and Politico from the White House, and he threatened similar action against other outlets. He accused the three outlets of reporting “fake news.” He said news organizations shouldn’t be able to keep publishing fiction and lies about the president. (Trump says he’s banning CNN, Politico and MS NOW from the White House.

It is unclear how far the ban goes. There was no immediate sign that the administration had taken steps to enforce it. CNN reported that its team was still at the White House on Friday afternoon. Asked about the move, Trump said it was worth pointing out whether or not it survives in court. (Trump says he’s ‘banning’ CNN, MS NOW and Politico from the White House.

The outlets pushed back. CNN said it has a constitutional right to report without government interference, and that enforcing the ban would be an illegal assault on that right. Politico said it would defend its First Amendment rights vigorously and called Trump’s claims that it received government subsidies false and debunked.

The move follows earlier fights over press access. In 2018, the White House revoked CNN reporter Jim Acosta’s credential, and a federal judge ordered it restored. Last year, the administration barred the AP from some events, prompting a First Amendment case that is still pending. The D.C. Circuit has held that once the White House opens general press facilities, access can’t be denied arbitrarily, though it has given the White House more discretion over restricted spaces like the Oval Office and Air Force One.