President-elect Donald J. Trump has made big promises on Ukraine, Iran, China and crises around the globe. But he will have ...

Wiser about the use of power, the newly sworn-in president suggests that this time he will not take no for an answer, whether ...

David E. Sanger is a national security correspondent and senior writer for the New York Times, a contributor to CNN and an adjunct lecturer at the Kennedy School of Government. In a 38-year ...