The area of climate change has a dramatic impact on national security.

Winning in Afghanistan is having a country that is stable enough to ensure that there is no safe haven for Al Qaida or for a militant Taliban that welcomes Al Qaida. That's really the measure of success for the United States.

I think it's extremely important that the president Donald Trump himself indicate that he too wants to discover the full truth behind what the Russians did to elections 2016.

China is a major power in the Pacific and I think we are dealing with some common threats in that region: the whole issue of Korea and the stability of Korea, the whole issue of nuclear proliferation, the whole issue of providing free access to our ships that are operating in that area.

We either believe in the dignity of the individual, the rule of law, and the prohibition of cruel and unusual punishment, or we don't. There is no middle ground.

Rather than undermining the Palestinian Authority, it is in Israel's interests to strengthen it by... continuing to transfer Palestinian tax revenues and pursuing other avenues of cooperation.

After every major conflict - World War I, World War II, Korea, Vietnam, the fall of the Soviet Union - what happened was that we ultimately hollowed out the force, largely by doing deep across-the-board cuts.