NATO leaders will gather in Ankara, Turkey, on July 7-8 [1] to address defense-spending gaps and the future of U.S. commitment to the alliance.

The summit arrives at a critical juncture as President Donald Trump has questioned the level of U.S. support for the organization. The outcome of these meetings could determine the stability of the transatlantic security architecture and the continuity of military aid to Ukraine.

Allied leaders are attempting to reassure the U.S. president that the organization is meeting his expectations regarding burden-sharing. Central to the discussions are defense-spending shortfalls among European members, a recurring point of contention for the Trump administration.

Beyond financial obligations, the summit is focused on measures to "Trump-proof" arms deliveries to Ukraine. There are significant concerns among member states that the president's demands for loyalty could undermine the alliance's ability to provide consistent military support to Kyiv.

NATO Secretary-General Jens Stoltenberg and Dutch Prime Minister Mark Rutte are among the key figures navigating these tensions. The secretary-general has been in office for approximately two years [2] and faces the challenge of maintaining unity while the U.S. demands more than just financial contributions from its partners.

Leaders are working to prevent a fragmentation of the alliance that could embolden adversaries. The goal is to convince the U.S. administration that NATO remains a viable and equitable partnership, even as the president continues to challenge the traditional framework of the alliance.

Allied leaders are trying to reassure Trump and maintain alliance cohesion.

This summit represents a shift from traditional multilateral diplomacy to a more transactional approach to security. By attempting to 'Trump-proof' Ukraine aid, NATO members are acknowledging a perceived volatility in U.S. foreign policy and are seeking to institutionalize support mechanisms that can survive changes in presidential priorities.