The United States can't be sheriff of the whole world.

Al Qaeda will always focus on us, the United States. And they will take advantage of any situation.

I think Iran is a very dangerous country - very dangerous to Israel, to the Middle East, and also to the United States. They export terrorism. And they also have the ability to manufacture rockets and missiles.

It devolves upon the United States to help to motorize the world.

I'm the president of the United States. I'm not the emperor of the United States.

We're asking what kind of world the United States wants to inhabit in 2015, and what policies it should pursue now to promote that outcome.