Donald Trump's decision to impose tariffs on steel and aluminum is the most significant set of U.S. import restrictions in nearly half a century. It will have huge consequences for the global trading…

Diplomacy could well come to occupy center stage for a president who relishes summitry.

Donald J. Trump will assume the U.S. presidency at a time of flux in South Asia. Afghanistan appears at risk of greater instability, Pakistan continues to harbor terrorists that attack its neighbors,…