ANKARA – Any hope that a more conciliatory President Donald Trump would arrive at this year’s NATO summit has evaporated, replaced by a public display of frustration that threatens to further strain the cohesion of the North Atlantic Alliance.
The summit in Ankara has transitioned from a diplomatic exercise in alliance-building into a venue for the U.S. president to air a series of deep-seated grievances against both adversaries and the very allies the organization is designed to protect.
The friction underscores a growing divergence in strategic priorities between Washington and its European partners, arriving at a moment when the alliance is already struggling to coordinate a unified response to the escalating war with Iran.
A Climate of Confrontation
President Trump arrived in Turkey having already characterized his attendance as a begrudging gesture of respect toward Turkey’s leadership. However, the level of hostility displayed on Wednesday exceeded the low expectations of diplomats gathered in the Turkish capital, according to officials present at the closed-door sessions.
Central to the president’s anger is the conduct of the Islamic Republic of Iran. Trump asserted that Tehran has been fundamentally dishonest in its dealings with the United States, a sentiment that has colored his approach to the summit’s security agenda and discussions over potential rules of engagement for NATO assets supporting U.S. operations.
This volatility extended to the internal dynamics of the alliance. Trump expressed open resentment toward NATO allies who rebuffed his ambitions to annex Greenland, a move that would have significantly expanded U.S. strategic footprints in the Arctic Circle and raised complex questions under the North Atlantic Treaty’s territorial scope.
Further complicating the diplomatic atmosphere is a logistical rift with Spain. The president voiced fury over Madrid’s refusal to grant U.S. aircraft access to Spanish bases, a restriction that directly impacts American operational planning in the current conflict with Iran and tests long-standing bilateral defense arrangements within the NATO framework.
The Burden of Defense Spending
Much of the president’s ire is rooted in the long-standing dispute over “burden sharing”-the political commitment, endorsed by leaders at recent summits, that NATO members should move toward spending at least 2% of their GDP on defense. That target, while non-binding, has become a litmus test for alliance solidarity in Washington.
Trump framed the current spending deficit not as a failure of current leadership, but as a generational dereliction of duty by his predecessors.
“It should have happened years ago and it couldn’t. But Obama didn’t do it and Biden didn’t do it. And frankly, Bush didn’t do it either,” Trump said of the effort to compel European nations to increase their defense budgets.
The U.S. has long argued that it carries a disproportionate share of the financial and military weight of the alliance, a point of contention that has historically threatened the stability of the North Atlantic Treaty, the 1949 founding document that commits members to collective defense while leaving spending levels to national governments.
European officials counter that many allies have sharply increased outlays in recent years and that spending alone does not capture the political risks they assume by hosting U.S. forces, deploying troops to coalition missions, and aligning with Washington on sanctions and export controls targeting Iran’s security apparatus.
Management by Flattery
NATO Secretary General Mark Rutte has spent months attempting to insulate the alliance from this volatility. In a bid to prevent the exact scenario unfolding in Ankara, Rutte visited the White House last month, utilizing data and charts to show that a majority of allies are now on track to meet or approach the 2% benchmark and to argue that this shift is in part a response to Trump’s pressure.
As the summit began, Rutte attempted to pivot Trump’s anger into a political victory, attempting to frame the push for higher European spending as a personal win for the U.S. president and a deliverable he could promote at home ahead of next year’s electoral calendar.
“It’s your win, your win,” Rutte told the president, urging him to “grab the win” regarding the boost in defense spending and growing European willingness to finance additional support for operations linked to the Iran conflict.
The attempt at diplomatic flattery appeared to fail. Trump dismissed the encouragement and moved swiftly to end the interaction, asking, “Any questions?” before abruptly transitioning to other business and leaving several allied leaders visibly unsettled, according to people in the room.
The summit continues under the shadow of these unresolved disputes, with NATO members remaining divided on the logistical and financial requirements of the war with Iran and on how far the alliance should be drawn into U.S.-led operations beyond the treaty area. For now, Ankara has laid bare the tension between a U.S. president demanding immediate concessions and an alliance that still functions by consensus, formal communiqués and painstaking, line-by-line diplomacy.
