President Trump said Friday he is banning CNN, MS NOW and Politico from the White House "effective immediately," escalating his long-running battles with news organizations. Why it matters: Trump is seeking to use White House access against news outlets whose coverage he objects to, while threatening to target additional organizations. The latest: Trump's Truth Social post called the three outlets "Fake News" and accused them of reporting "FICTION and LIES," before threatening to also ban other "Fake News Media Outlets." The White House, CNN, MS NOW, Politico and the White House Correspondents' Association have not responded to Axios' request for comment. Between the lines: The scope of the ban wasn't immediately clear from Trump's post. As of shortly after the social media post, CNN continued to work from the White House, the network reported. The D.C. Circuit Court of Appeals has previously held that once the White House opens general press facilities to journalists, access can't be denied arbitrarily, and press pass restrictions must come with due process. A divided appellate court last year said the White House does have broader discretion over which journalists enter restricted spaces like the Oval Office and Air Force One. That case, brought by the Associated Press, remains unresolved. Friction point: Trump has previously moved to restrict access for reporters and outlets he has clashed with. In 2018, the White House revoked CNN reporter Jim Acosta's credential. A federal judge later ordered the pass restored. Last year, the administration barred the AP from some events because it continued use of "Gulf of Mexico," sparking the still-pending First Amendment case. State of play: The White House took control of the presidential press pool from the White House Correspondents' Association last year. The Pentagon has also restricted press access, but a federal judge this year struck down parts of its credentialing policy. The Defense Department responded with a different restrictive policy that was also blocked, though that decision has been stayed pending appeal. Last month, the Treasury Department denied credentials to some journalists who sought to cover the G20 meeting in North Carolina. Editor's note: This is a breaking news story and will be updated.