Democratic presidential hopeful Andrew Yang made the case for an ombudsman to monitor malicious speech in the US.

"We have to be able to sort out people who are maliciously informing the American people and that to me is a much greater danger than we face now," he said.

He brought up the UK and how it monitors certain speech. Yang said they had something equivalent to an ombudsman, where complaints are filed and taken under review.

"So if they can do that, why can't we?" Yang asked.

Yang said foreign actors are investing money to maliciously doctor information to corrupt US democracy and "then frankly having a good laugh about it."

"Right now we're on the verge of a difficult time. So Americans can't trust what we see," he said.