Donald Trump says he is banning CNN and Politico from White House

Reporters from both Politico and CNN were still on the White House grounds shortly after the announcement was made.

A crew from CNN was also travelling with Vice-President JD Vance to and from an event in Iowa.

In a statement, the network called a potential ban illegal and said it "stands fully behind our White House team and their fair and accurate reporting."

"We have a right under the US Constitution to do that reporting without hindrance or interference from the government," the CNN statement said. "Should the ban which President Trump threatened go ahead, it would be an illegal assault on that fundamental and constitutionally-protected right."

Politico also released a statement, saying it "will continue to fairly report on this White House and future ones.

"We will vigorously defend our First Amendment rights against any attempt to restrict them."

MS NOW, formerly MSNBC, declined to comment.

In his post Trump said: "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 news outlets to follow."

The post did not mention specific stories or reporting that led to the move.

Asked about the ban in the Oval Office, Trump said that there was "no reason" for the announcement being made on Friday afternoon.

"It's really just cumulative stories over the last few years," he said. "You get sick of it."

Trump added that there "may be others to join them", but did not name any specific news outlets.

He also acknowledged that legal challenges may follow his announcement, saying "I think it's good to point it out, whether it survives or doesn't".