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US threatens to leave NATO after allies refuse to support Iran war

US threatens to leave NATO after allies refuse to support Iran war

Force in Play

Trump agrees to stay in NATO after Rutte secures pledge on defense spending and allied military support

April 9th, 2026: European allies begin formalizing defense spending acceleration pledges

Overview

The North Atlantic Treaty Organization (NATO) survived its most serious existential threat in decades after NATO Secretary General Mark Rutte's personal diplomacy with President Trump at the White House on April 8, 2026, yielded a conditional agreement to keep the US in the alliance. Trump, who had called NATO a 'paper tiger' and said withdrawal was 'beyond reconsideration' just one week earlier, agreed to remain a member after Rutte extracted commitments from allied nations to accelerate defense spending timelines and pledge military support for future US operations. The breakthrough came one day after a US-Iran ceasefire brokered by Pakistan, which had triggered the alliance crisis when several NATO members refused to provide airspace and base access for American strikes on Iranian targets.

The deal preserves NATO's 77-year institutional structure but reshapes its operational foundation. Allies committed to reaching the 5% GDP defense spending target by 2030 instead of 2035, and agreed in principle to support US military operations outside Europe when requested—a direct response to the airspace and basing denials that sparked Trump's withdrawal threats. However, the agreement remains fragile: implementation depends on allied follow-through, and Trump retains the ability to withdraw if he deems commitments insufficient. A 2023 law requires congressional approval for formal NATO withdrawal, but the president retains broad authority over day-to-day participation, leaving the alliance's long-term stability uncertain.

Why it matters

If the US disengages from NATO, the security architecture that has prevented major war in Europe for eight decades unravels.

Play on this story Voices Debate Who Said What? Predict

Key Indicators

77 years
Age of the NATO alliance
Founded in 1949, NATO survived the Cold War and now its most serious post-war existential crisis
2030
New NATO defense spending deadline
Accelerated from 2035 to 2030 for 5% GDP target, per April 8 agreement
~60%
US share of NATO defense spending
The US accounts for roughly 60% of total alliance defense expenditure, a longstanding source of friction
4+
Allies that denied US military access during Iran war
Spain, Italy, France, and the UK restricted US use of bases or airspace, triggering the crisis
2/3
Senate supermajority required to formally withdraw
A 2023 law bars unilateral presidential withdrawal from NATO without Senate or congressional approval

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People Involved

Mark Rutte
Mark Rutte
Successfully negotiated Trump's conditional agreement to remain in NATO
 Donald Trump
Donald Trump
Agreed to remain in NATO contingent on accelerated defense spending and allied military support
 Marco Rubio
Marco Rubio
Calling for reexamination of NATO's value to the US
 Pete Hegseth
Pete Hegseth
Refusing to reaffirm US commitment to NATO collective defense
 Matthew Whitaker
Matthew Whitaker
Confirmed Trump is 'reevaluating everything' about NATO

Organizations Involved

North Atlantic Treaty Organization (NATO)
North Atlantic Treaty Organization (NATO)
Military alliance
Facing existential challenge from its most powerful member

A 32-member transatlantic military alliance built on the principle that an attack on one member is an attack on all, now tested by the refusal of several members to support US operations in Iran.

Timeline

June 2025 April 2026

12 events Latest: April 9th, 2026 · 1 month ago Showing 8 of 12
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  1. European allies begin formalizing defense spending acceleration pledges

    Latest Diplomacy

    NATO member states began issuing formal statements committing to the accelerated 2030 defense spending deadline and pledging military support frameworks for future US operations, signaling acceptance of Trump's conditions for continued US participation.

  2. Rutte meets Trump at White House in alliance-rescue summit

    Diplomacy

    NATO Secretary General Rutte met with Trump, Rubio, and Hegseth at the White House. Rutte aimed to persuade Trump that NATO still serves US strategic interests despite allied refusals to support the Iran war.

  3. Trump agrees to remain in NATO after Rutte secures defense spending acceleration

    Diplomacy

    Following a White House meeting with NATO Secretary General Rutte, President Trump agreed to keep the US in NATO contingent on allies accelerating the 5% GDP defense spending target from 2035 to 2030 and pledging military support for future US operations. Trump's withdrawal threats were effectively suspended, marking a dramatic reversal from his 'paper tiger' rhetoric one week prior.

  4. US and Iran agree to two-week ceasefire

    Diplomacy

    Pakistan brokered a two-week ceasefire halting 40 days of US-Israeli strikes on Iran. Iran agreed to reopen the Strait of Hormuz during the truce. Formal talks were set for Islamabad on April 10.

  5. Trump says withdrawal is 'beyond reconsideration'

    Statement

    In an interview with The Telegraph, Trump called NATO a 'paper tiger' and said leaving the alliance was 'beyond reconsideration.' Ambassador Whitaker confirmed on Newsmax that the president is 'reevaluating everything.'

  6. Hegseth refuses to reaffirm Article 5 commitment

    Statement

    Defense Secretary Hegseth declined to reaffirm the US commitment to NATO's collective defense clause, saying the Iran conflict had 'laid bare' problems with the alliance. Rubio separately said the US must 're-examine' NATO's value.

  7. US begins military campaign to reopen the Strait

    Military

    US armed forces launched a sustained operation to clear and reopen the Strait of Hormuz, striking over 8,000 Iranian military targets including 130 vessels.

  8. Trump announces intent to seize control of Strait of Hormuz

    Statement

    Trump declared the US would take control of the Strait of Hormuz and warned Iran against laying mines in the waterway.

  9. Iran closes the Strait of Hormuz

    Escalation

    Iran's Islamic Revolutionary Guard Corps officially closed the Strait of Hormuz to shipping, disrupting roughly 20% of the world's oil supply and sending global energy prices soaring.

  10. US and Israel launch joint strikes on Iran

    Military

    The US launched Operation Epic Fury alongside Israel, striking Iranian military and nuclear targets. The initial strikes killed Iran's supreme leader Ali Khamenei. Multiple NATO allies refused to provide basing or airspace access for the operations.

  11. Rutte defuses Greenland crisis at Davos

    Diplomacy

    Rutte met Trump at the World Economic Forum and brokered a framework for Greenland negotiations, persuading Trump to drop threats of forceful annexation and retaliatory tariffs against Europe.

  12. NATO allies pledge 5% GDP defense spending at The Hague

    Summit

    At the 2025 summit, all NATO members except Spain agreed to spend 5% of GDP on defense by 2035—3.5% on military forces and 1.5% on security infrastructure. The commitment more than doubled the previous 2% target.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

March 1966

France withdraws from NATO military command (1966)

French President Charles de Gaulle pulled France out of NATO's integrated military command structure over disagreements about nuclear weapons control and American dominance of the alliance. All 30-plus NATO bases in France were evacuated—27,000 US troops and 37,000 civilians relocated. NATO headquarters moved from outside Paris to Brussels.

Then

France remained a political member of NATO but operated its military independently for over four decades.

Now

France rejoined NATO's military command in 2009 under President Sarkozy, demonstrating that even dramatic ruptures in alliance participation can be reversed—but also that they can last generations.

Why this matters now

France's 1966 exit is the closest precedent for a major power partially withdrawing from NATO. It shows that an alliance member can reduce participation without formal departure—but also that the damage to allied trust and coordination can persist for decades.

May 2017 – January 2021

Trump's first-term NATO Article 5 ambiguity (2017–2021)

During his first term, Trump repeatedly questioned NATO's value, demanded allies spend more, and at a May 2017 ceremony at NATO headquarters became the only post-war president to decline to explicitly endorse Article 5's mutual defense guarantee. He reportedly told aides multiple times he wanted to withdraw from NATO entirely.

Then

Allied defense spending increased—the number of members meeting the 2% GDP target rose from 3 in 2014 to 11 by 2021. But trust in US reliability declined significantly.

Now

Congress passed the 2023 law requiring legislative approval for withdrawal—a direct response to fears Trump might act unilaterally in a second term. European defense cooperation accelerated through EU mechanisms.

Why this matters now

Trump's current threats follow a pattern established in his first term, but with a critical difference: this time there is a concrete grievance (allied refusal to support active combat operations) rather than an abstract burden-sharing complaint. The congressional guardrail passed in response to first-term threats is now being tested.

October–November 1956

Suez Crisis fractures NATO allies (1956)

Britain, France, and Israel secretly invaded Egypt to seize the Suez Canal after Egyptian President Nasser nationalized it. US President Eisenhower was furious at not being consulted and threatened economic sanctions against his own allies. The US forced Britain and France to withdraw, humiliating two of NATO's founding members.

Then

British Prime Minister Anthony Eden resigned. France concluded it could never depend on the US and accelerated its independent nuclear program.

Now

The crisis established that NATO allies could pursue sharply different military objectives in the Middle East without destroying the alliance—but also that such rifts carry lasting strategic consequences.

Why this matters now

Suez is a mirror image of the current crisis: in 1956, the US opposed allied military action in the Middle East; in 2026, allies opposed US military action. Both cases tested whether disagreements over out-of-area operations could break an alliance built for European defense.

Sources

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Stars and Stripes UPI Euronews TIME Axios The Hill Breaking Defense Al Jazeera CNN NATO Wikipedia Reuters BBC News Associated Press Politico Europe Euractiv The Hill CNN Al Jazeera