President Trump insisted again today that there was no collusion and that he ran a "clean campaign."

"There was no collusion at all. Everybody knows it," Trump said.

He said special counsel Robert Mueller's investigation into Russian interference in the 2016 US election has had a "negative impact" on the US-Russia relationship.

"It's ridiculous. It's ridiculous what's going on with the probe," Trump said.

The President said he also discussed with Russian President Vladimir Putin that there was "zero collusion."