United States President Donald Trump has reignited debate over the future of the North Atlantic Treaty Organization (NATO), declaring that it is "ridiculous" for the United States to continue maintaining what he described as a "one-sided" level of support for the military alliance.
His remarks, made days before a key NATO summit in Ankara, Turkey, have once again raised questions about Washington's long-term commitment to the 32-member security bloc.
In a post on his Truth Social platform, Trump argued that the United States bears a disproportionate share of NATO's defense burden while receiving insufficient support from its allies.
"They were not there for us!!!" he wrote, adding that Washington's relationship with NATO "is not reciprocal."
The president accompanied his message with a chart comparing defense spending among NATO members, highlighting the significantly larger U.S. military budget relative to other allies.
Trump's latest comments are consistent with his long-standing criticism of NATO, an alliance he has repeatedly accused of allowing European countries to rely too heavily on American military protection.
Throughout his political career, he has argued that many allies have failed to contribute their fair share toward collective defense, placing an unfair financial burden on U.S. taxpayers.
The renewed criticism comes less than a week before NATO leaders are scheduled to gather in Ankara for a summit expected to focus on defense spending, the alliance's future strategy, Russia's continued military threat, and Europe's growing role in regional security.
Analysts say Trump's remarks are likely to dominate discussions among member states already concerned about maintaining unity within the alliance.
A major source of Trump's frustration has been the response of several European allies during the recent conflict involving Iran. According to the U.S. administration, some NATO members declined to provide military assistance or restricted the use of their bases for American operations, reinforcing Trump's argument that the alliance has failed to support the United States during times of need.
Secretary of State Marco Rubio has acknowledged that these disagreements are expected to be a central topic during the upcoming summit.
Despite his criticism, Trump has also claimed credit for pushing NATO members to increase defense spending.
Under pressure from Washington, alliance leaders previously agreed to work toward spending 5 percent of their gross domestic product on defense by 2035, a significant increase from the long-standing guideline of 2 percent.
Several member states have already begun raising military budgets, although not all are on track to meet the new target.
Defense analysts note that while the United States does spend far more on defense than any other NATO member in absolute terms, its military budget supports global operations extending well beyond Europe.
They argue that comparing national defense budgets alone does not fully capture the strategic benefits the United States derives from the alliance, including access to overseas military bases, intelligence sharing, and coordinated responses to international security threats.
Founded in 1949, NATO was established to provide collective defense against external aggression, with its cornerstone principle stating that an attack on one member is considered an attack on all.
Over the decades, the alliance has expanded to include 32 countries and has played a central role in maintaining European security, responding to international crises, and supporting military operations in regions such as the Balkans, Afghanistan, and Eastern Europe.
Trump's latest statement has generated mixed reactions across Europe and the United States. Supporters argue that his demands are necessary to ensure greater burden-sharing among allies, while critics warn that continued attacks on NATO risk weakening one of the world's most successful military alliances at a time of heightened geopolitical tensions.
Security experts caution that uncertainty over America's commitment could encourage strategic rivals while prompting European nations to accelerate efforts toward greater defense independence.
As NATO leaders prepare to meet in Ankara, Trump's remarks have added fresh uncertainty to discussions about the alliance's future.
While no formal policy changes have been announced, the debate over defense spending, burden-sharing and America's leadership role is expected to dominate the summit.
The outcome of those discussions could shape the future direction of transatlantic security cooperation and redefine the balance of responsibilities within the alliance for years to come.