Candidate Donald Trump set off a furious controversy when he said NATO countries should pay their “fair share” of mutual defense costs and, later, that the treaty organization was “obsolete” because not enough of its efforts were directed against radical Islamic terrorism.

On Monday, Vice President Mike Pence took the Trump message to NATO headquarters in Brussels. And after all the controversy and complaining, NATO’s response could be boiled down to a single sentence: Yes sir, Mr. Trump.