In the run-up to the summit, Spain emerged as the lone holdout against the spending target. Pedro Sánchez, Spain’s prime minister, is in a tight spot at home, battling allegations of corruption by his aides and unable to pass a budget. “A 5% spending would be disproportionate and unnecessary,” he said on June 22nd.

Nearly all members of the transatlantic alliance agreeing to spend 5% of their gross domestic product on defense — a priority of President Trump's for years.