U.S. aid is critical not just for Ukraine, but for U.S. credibility in Russia and beyond.

History will judge the Trump presidency to have been a consequential one, but more for its destructive effects than for its achievements.

The transatlantic alliance is enjoying a period of restoration following the damage done by former U.S. President Donald Trump. But as the West’s messy exit from Afghanistan has made clear, the Unite…

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

Next week Donald J. Trump returns to the United Nations for the annual opening of the UN General Assembly. While Trump exceeded expectations during his first UN appearance last year, he will face mor…