Washington: It's pretty clear what US President Donald Trump is doing by going after the media. He sees someone who is tough on him, with a lower approval rating, and he sets up a contrast. It's like making yourself look taller by standing next to a short person.

"You have a lower approval rate than Congress," he needled reporters at last week's news conference, making clear he had done the math.

Except maybe it's not really working.

A new poll from Quinnipiac University suggests that while people may be broadly unhappy with the mainstream media, they still think it's more credible than Trump. The President regularly accuses the press of "fake news", but people see more "fake news" coming out of his own mouth.