President Donald Trump speaks with reporters on Air Force One while in flight from Joint Base Andrews, Md., to Amsterdam, Netherlands, Tuesday, June 24, 2025. Donald Trump refused to say if he was committed to the founding principle of Nato last night.While on his way to the alliance’s summit in the Netherlands, the US president sidestepped questions about Article 5.Article 5 states that an attack against one Nato ally is considered an attack against all of them.It’s the concept of collective and mutual defence, which Nato has described as “the heart” of its founding treaty.But Trump seemed less than convinced by that premise while on board Air Force One when a reporter asked: “Are you committed to Article 5 of Nato?”The president replies: “Er, depends on your definition, there are numerous definitions of Article 5, you know that right?”Nato’s