European leaders have growing concerns about the U.S. administration's approach to NATO under President Trump's second term. The secret January 2026 summit of nearly 30 European national leaders reflected emotional and intense discussions focused on the unpredictability of U.S. policies and the potential impact on European security.
Many European states worry about the implications of the U.S. reviewing its military presence and possibly realigning forces as part of the "NATO 3.0" strategy. The concerns center on the future reliability of U.S. support and the cohesion of the alliance.
The challenges to maintaining united defense spending commitments add to the doubts about the alliance's future.
Despite these concerns, the NATO summit in Ankara remains a critical moment to address these tensions and work towards reinforcing transatlantic security cooperation amid evolving geopolitical realities.