The leaders reaffirmed their “ironclad commitment” to NATO’s collective defense clause, Article 5. In recent years, Trump had sowed seeds of doubt about whether the U.S. — NATO’s most powerful member — would come to the aid of any ally under attack.

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.

NATO leaders gathered in The Hague on Wednesday for a summit tailor-made for U.S. President Donald Trump, with European allies hoping a pledge to hike defence spending will prompt him to dispel doubts about his commitment to the alliance.