“Snapback” sanctions will be triggered by the end of August if Tehran fails to make concrete progress to limit its nuclear program.

© Maxar Technologies, via Reuters

After European leaders stepped up military spending, President Trump aligned himself more closely with them on the war. But his tariff threats have left bruises.

© David Guttenfelder/The New York Times

Under the plan, other NATO countries would buy U.S.-made arms, then give them to Ukraine to defend itself against Russia. NATO’s secretary general was set to meet Mr. Trump on Monday.

© David Guttenfelder/The New York Times

Europeans have agreed to pay more for arms and want to spend it at home. But can its manufacturers rush to compete with dominant U.S. firms?

© Davide Monteleone for The New York Times