We've backed off in good faith to try and give you a chance to straighten this problem out. But I am going to beg with you for a minute. I'm going to plead with you, do not cross us. Because if you do, the survivors will write about what we do here for 10,000 years.

We do not draw red lines unless we intend to carry them out. We have made very clear that we are willing to work with China, and we believe China has tried to be helpful.

The most important six inches on the battlefield is between your ears.

Congressman [Mike] Pompeo said he believes the intelligence agencies' claims that Russia hacked the US election.

In a country with millions of people & cars going everywhere, the enemy is going to get a car bomb out there once in a while.

I think the core problem is much closer to recognizing where force is of value, where it is useful, and to distinguish that from situations in which war is not useful or is indeed counterproductive.

We are going to have to continue to keep the pressure on the enemy. There is no room for complacency on this.