Donald Trump Jr insists he's not worried about Mueller -- and says NYT op-ed 'subverts the vote of the American people'

Donald Trump Jr. complained that his father had few White House staffers he could trust following an anonymous New York Times op-ed and the publication of Bob Woodward's new book.

The president's son appeared Tuesday on ABC's "Good Morning America," where he called the op-ed "pretty disgusting" and described the unknown author as a "low-level person."

“I think there are people in there that he can trust, it's just -- it's a much smaller group than I would like it to be,” Trump Jr. said.

He accused the author of subverting the democratic rule of law.

"This is very low-level person who will ... basically subvert the vote of the American people who elected my father to do this job,” Trump Jr. said.

President Donald Trump's son also insisted he was not particularly worried about special counsel Robert Mueller's investigation of campaign ties to Russia.

"I’m not (worried) because I know what I did and I’m not worried about it,” Trump Jr. said.

He told ABC that he did not tell his father in advance that he was meeting with a Russian lawyer at Trump Tower to discuss damaging information against Hillary Clinton.

"[I] testified to that ad nauseum,” Trump Jr. said. “That doesn’t mean they won’t try to do something."