Western leader questions NATO Article 5 guarantee

A major Western leader has publicly stated that NATO's Article 5 collective defense guarantee, which states an attack on one member is an attack on all, cannot be taken for granted. This marks the first time such a high-level figure has openly expressed doubt about the alliance's foundational security principle. The statement reflects growing private concerns within Europe about the credibility of mutual defense commitments. The leader's remarks were not made by an adversary but by a member of the alliance itself.