I would immediately rejoin the Paris Accords and reassert U.S. leadership in the critical process of global diplomacy.

Our country desperately needs a president with a depth of global experience and an understanding of all the elements of our nation's power, from our economy and our diplomacy to the power of our ideals and our military, including its limitations.

It's like I learned in the military: the officers always ate last. When you're responsible for people, that's how it should be.

In the face of a rising China, along with authoritarian regimes from Brazil to the Philippines to Turkey to Russia, and the constant presence of belligerent non-state actors, we need to reform our military to deal with asymmetrical threats.