Maybe that's how I learned to handle my deep hurt - by forgetting.

Our friends can't trust us anymore. You know, Ukraine was a nuclear-armed state. They gave away their nuclear arms with the understanding that we would protect them. We won't even give them offensive weapons.

What we have to stop and think about is that we have weakened ourselves militarily to such an extent that if affects all of our military policies.

This whole concept of boots on the ground, we've got a phobia about boots on the ground. If our military experts say, we need boots on the ground, we should put boots on the ground and recognize that there will be boots on the ground and they'll be over here, and they'll be their boots if we don't get out of there now.

You don't have to be a brain surgeon to be a valuable person. You become valuable because of the knowledge that you have. And that doesn't mean you won't fail sometimes. The important thing is to keep trying.

We should use our economic power in lots of different ways. I think we can use that in order to keep [Vladimir] Putin contained, because he is a one-horse show. Energy. And we have an abundance of energy, but we have archaic energy exportation rules. We need to get rid of those, allow ourselves to really make Europe dependent on us and other parts of the world dependent on us for energy. Put him back in his little box where he belongs.

Ruthless is not necessarily the word I would use, but tough, resolute, understanding what the problems are, and understanding that the job of the president of the United States is to protect the people of this country and to do what is necessary in order to get it done.