Europe’s little-known mutual defence clause: Is it a NATO substitute?

European leaders are sounding the alarm on US tensions, sparking a renewed debate about the bloc's mutual defense pact. In a move that could have significant implications for transatlantic relations, several top European officials are pushing for a discussion on activating the EU's mutual assistance clause, also known as Article 42.7. This clause, enshrined in the Lisbon Treaty, would require member states to come to each other's aid in the event of an attack on one of their own. As US-EU relations continue to fray, particularly over issues like trade and security, European leaders are increasingly questioning the reliability of their traditional ally and exploring alternative arrangements to ensure their own collective defense.

Several European leaders have called for a discussion on using the bloc's mutual assistance clause amid US tensions.