Washington, Sept. 21 -- CNN, MS NOW and Politico said on Monday they would sue the Trump administration over President Donald Trump's decision to bar the three news organisations from the White House, arguing that the move violates the First Amendment.

The outlets said they had notified the administration of the legal action and would seek to restore their access after their journalists were turned away from the White House on Saturday and had their press credentials revoked. The case is being brought in the US District Court for the District of Columbia, with emergency proceedings potentially taking place this week.

"There could not be a more direct assault on the First Amendment," the news organisations said in their legal filing, argui...