NATO leaders concluded a two-day summit in Ankara, Turkey, on Wednesday marked by contrasting dynamics between U.S. President Donald Trump’s contentious presence and the alliance’s ongoing efforts to strengthen collective defense and adapt to new security challenges. The summit highlighted both Trump’s confrontational style and NATO’s quieter, steady progress toward increased European responsibility and enhanced trans-Atlantic military cooperation.

Throughout the meeting, Trump dominated headlines with a series of grievances aimed at alliance members, criticizing their defense spending and loyalty, while also announcing new U.S. airstrikes against Iran—a move that caught allies by surprise. His rhetoric included renewed threats, such as the controversial suggestion to purchase Greenland, and direct complaints about perceived European shortcomings, particularly around support for U.S. and Israeli actions in Iran.

Despite the president’s volatile conduct, European leaders largely dismissed his attacks as familiar but ultimately hollow, with no immediate actions that might destabilize the alliance. Experts noted that while Trump’s rhetoric erodes trust in America, many allies have grown accustomed to his confrontational approach. However, some analysts warn that troop withdrawals and military asset reductions could have more tangible consequences beyond mere words.

Parallel to Trump’s high-profile interventions, NATO pursued more traditional agendas focused on enhancing collective defense, financing, and support for Ukraine amid its ongoing conflict with Russia. The alliance emphasized increased military spending commitments, with promises to reach 5 percent of national income by 2035, and boosted funding for defense infrastructure, including a €27 billion ($31 billion) investment in fuel storage and pipeline networks along NATO’s eastern flank.

NATO Secretary General Jens Stoltenberg underscored these developments, highlighting $50 billion in new arms contracts agreed upon during the summit. His efforts to appeal to Trump included presenting data in Washington showing over $1.2 trillion in additional allied defense expenditures since Trump’s first term, underscoring that European nations have responded to his calls for greater financial contributions.

Still, frustration persisted among many leaders who viewed Trump’s behavior as undermining the opportunity to build on these gains. French President Emmanuel Macron reported that Trump refrained from criticizing allies during a closed-door session and praised greater European militarization but maintained a firm stance on the need for increased defense spending.

By the summit’s close, Trump softened his tone somewhat, describing the meeting as displaying “a lot of love” and “a lot of unity,” and he publicly praised Turkish President Recep Tayyip Erdogan and Stoltenberg. Yet analysts characterize the gathering as two parallel summits: one driven by Trump’s unpredictable personal agenda, and the other by allies’ measured, pragmatic efforts to transform NATO.

Security experts point out that while the United States has successfully pressed Europe to boost defense spending and responsibility, the lack of consistent U.S. political engagement hampers alliance cohesion. The ongoing transformation aims to rebalance roles, with Europeans taking a larger share of conventional defense, enabling the U.S. to focus on other strategic priorities, such as countering China.

Ultimately, the Ankara summit revealed a NATO in transition, navigating internal tensions amid American unpredictability while striving to maintain unity and effectiveness in a rapidly evolving security environment.