Spanish Prime Minister Pedro Sánchez is sticking by his decision to break with NATO allies this week from spending more on defense.

Mr. Trump had been eager to celebrate his success at NATO and revel in the fact that he had conducted an attack that none of his predecessors had dared to launch. His view was backed up by Mark Rutte, the secretary general of the alliance, who wrote Mr. Trump a private message thanking him for his “decisive action” in Iran.

Spain said on Wednesday it did not expect any repercussions from its decision not to meet a defence spending target of 5% of gross domestic product that NATO member states are expected to set at a summit in The Hague.