The chief Washington correspondent of the New York Times offers a riveting insider's account describing the national security crises that will confront America's next president from a nuclear Iran to the lock up of Chinese oil supplies in Africa.

In 2015, Russian hackers tunneled deep into the computer systems of the Democratic National Committee, and the subsequent leaks of the emails they stole may have changed the course of American democracy. But to see the DNC hacks as Trump-centric is to miss the bigger, more important story: Within that same year, the Russians not only had broken into networks at the White House, the State Department, and the Joint Chiefs of Staff, but had placed implants...