Context:

Trump states he is ‘absolutely’ considering withdrawing the US from Nato, signaling a crisis in the alliance as allies decline to join the US-Israel war on Iran; the move would test a 77-year-old security framework. The threats come after European partners refused to participate in the conflict, intensifying skepticism about US commitment and prompting experts to warn of damaged trust within Nato. Legally and politically, formal withdrawal would be complex, with congressional and constitutional barriers already highlighted. The episode accelerates calls for Europe to retool its security posture and for new, more autonomous arrangements within the transatlantic framework. The incident points to an urgent need for coordinated European-US security planning going forward.

Dive Deeper:

• Trump has asserted he is 'absolutely without question' considering withdrawing the US from Nato, framing the issue as 'beyond reconsideration' after allies declined to join the Iran operation.

• Analysts argue the damage to alliance trust is already severe; historic mechanisms of collective defense rely on members’ willingness to defend one another, which is now in question.

• The US launched the Iran operation with Netanyahu without consulting Nato members and did not invoke Article 5, contributing to a perception of U.S. unilateralism and straining allied solidarity.

• Congress has previously acted to 'Trump-proof' Nato by restricting unilateral withdrawals in the NDAA of 2024, requiring two-thirds Senate approval or congressional action to exit, and prohibiting federal funds for withdrawal.

• Experts warn that even if a formal exit is blocked, the ability or willingness of allies to rely on US defense commitments may be eroded, prompting European leaders to seek a more autonomous or diversified security approach.