John McCain: “On the issue of Ukraine, my hero, Teddy Roosevelt, used to say talk softly but carry a big stick.”

The United States faces a new strategic reality in Europe. The first step in addressing it is to recognize the scope, scale, and seriousness of the challenges Russia presents to our national security and to the international order.

The Department of Energy's defense atomic energy programs are critically important to our national security.

Six years is still too long.

The National Defense Strategy offers a new framework for thinking about the global challenges we face and that places China squarely at the top of our priority list.