Donald Trump has launched a fresh attack on CNN after three journalists resigned over a retracted story on Russia.

"Wow, CNN had to retract big story on 'Russia,' with 3 employees forced to resign," the President wrote on Twitter.

"What about all the other phony stories they do? FAKE NEWS!"

Mr Trump followed his statement with retweets calling CNN the Fake News Network (FNN) and promoting coverage criticising the Democrats by right-wing broadcaster Fox News.

"Fake News CNN is looking at big management changes now that they got caught falsely pushing their phony Russian stories," he added later. "Ratings way down!"

Jack Posobiec, an alt-right activist and conspiracy theorist who was controversially given White House press accreditation last month, responded by calling on the administration to revoke CNN's access.