For the first time in NATO's history, all 32 member nations met or exceeded the alliance's 2% of GDP defense spending target in 2025 — a milestone that comes as debate intensifies over whether the United States should maintain its leadership role in the bloc. The achievement follows a year in which European allies and Canada increased defense spending by 20%, bringing their collective total to more than $574 billion, according to figures cited by NATO officials.
The breakthrough in allied contributions coincides with renewed strains between Washington and some European capitals. Several NATO members declined to support U.S. operations during the 2026 conflict with Iran and refused to allow American use of NATO bases for those missions — a decision that critics say exposed deeper fractures in transatlantic relations. The episode has prompted questions about whether the alliance can sustain cooperation on issues where member interests diverge.
What the Left Is Saying
Progressive Democrats and foreign policy skeptics within the party have long argued that decades of American security guarantees have enabled European allies to underinvest in their own defense. Sen. Bernie Sanders, I-Vt., has repeatedly stated that wealthy European nations should bear a greater share of the burden for their own security rather than depending on U.S. taxpayers to fund their defense.
Progressive groups have also raised concerns about NATO's expansion and the potential for diplomatic solutions being overlooked in favor of military posturing. Some Democratic lawmakers have called for rebalancing the alliance toward multilateral institutions and collective decision-making that gives Washington less unilateral influence.
Rep. Ro Khanna, D-Calif., has argued that American resources would be better directed toward domestic priorities, including infrastructure, healthcare, and climate initiatives, rather than maintaining expensive overseas military commitments. These critics contend that European nations have the economic capacity to fund their own defense but have lacked political will to do so.
What the Right Is Saying
Conservative defenders of NATO argue that the alliance remains essential to American security interests despite recent tensions. They point to Article 5′s invocation following the September 11 attacks — the first time in NATO history the collective defense clause was triggered — as evidence of the bloc's value to the United States.
NATO Secretary General Mark Rutte has firmly rejected suggestions that Europe can defend itself without American participation. Speaking earlier this year, Rutte warned European leaders: "If anyone thinks here … that the European Union or Europe as a whole can defend itself without the U.S., keep on dreaming. You can't." He emphasized that Europe would lose the vital U.S. nuclear umbrella and would need to more than double its defense spending to approach strategic autonomy — goals he characterized as unrealistic in the near term.
Conservative analysts argue that American leadership keeps the alliance cohesive and capable of responding to threats from Russia, China, and Iran. They contend that withdrawal or reduced engagement would create power vacuums that adversaries would exploit, potentially forcing the United States into costlier conflicts later.
What the Numbers Show
The 2025 spending figures represent a dramatic shift from recent history: in 2014, only three NATO members met the 2% target. Poland now leads allied defense spending at 4.48% of GDP, while Lithuania and Latvia both exceeded 3.7%. At the 2025 Hague Summit, NATO members agreed to pursue an even more ambitious goal of 5% of GDP by 2035.
More than 1,100 troops from NATO allies made the ultimate sacrifice fighting alongside U.S. forces in Afghanistan following the Article 5 invocation after September 11. Historical data shows the alliance has weathered significant crises before — including France's withdrawal from NATO's integrated military command structure in 1966 under President Charles de Gaulle and bitter divisions over the Iraq War in 2003.
The Bottom Line
The record 2025 spending achievement addresses a long-standing American complaint about European burden-sharing, but analysts say it may not fully resolve tensions over alliance direction. Questions remain about whether increased European defense investments will translate into capabilities that reduce reliance on U.S. military assets.
The coming months will test whether the NATO allies can reconcile disagreements over support for operations beyond Europe and find mechanisms to coordinate on shared threats while respecting diverging national interests. What happens at the next alliance summit could set the trajectory for American-European defense cooperation through the end of the decade.