Despite recent strains in U.S.-NATO relations stemming from President Trump's criticism of allies' defense spending shortfalls, limited support during the Iran conflict, and questions over Article 5 commitments, the sitting chief executive remains the primary driver behind the 76.5% implied probability that he will attend the July 7-8, 2026, summit in Ankara. Historical precedent shows U.S. presidents routinely participate in these gatherings as head of the alliance's largest member, with no confirmed scheduling conflicts, health concerns, or policy announcements indicating otherwise in the past month. NATO sources have discussed adjusting future summit frequency partly to manage potential friction, yet this year's event is proceeding as scheduled without signals of U.S. nonparticipation. Trader consensus incorporates these factors alongside the possibility of last-minute diplomatic developments altering attendance.