Longtime Trump confidant Roger Stone said Sunday he is open to cooperating with special counsel Robert Mueller’s federal Russia investigation.

“If there’s wrongdoing by other people in the campaign that I know about — which I know of none — but if there is, I would certainly testify honestly. I would also testify honestly about any other matter, including any communications with the president,” Stone told ABC News’ “This Week.” “It’s true that we spoke on the phone, but those communications are political in nature, they’re benign, and there is certainly no conspiracy with Russia. The president’s right, there is no Russia collusion.”