Former President Jimmy Carter:

I don't think he's doing well. He's made some very serious mistakes. I think the worst mistake he's made so far has been the appointment of John Bolton to be his national security adviser.

I know Bolton from way back at a distance. I have never met him personally. But he has been very eager to go to war with different people, including North Korea and Iran. He's been in the forefront of every kind of radical enhancement the United States can make based on its own military prowess.

He's — he's told lies about things where I knew the truth. And so I just have very little confidence in him.