Donald Trump is reportedly considering withdrawing the US from NATO, a move that would shake the Western security structure established after World War II, according to The Guardian.

NATO, formally founded in 1949, now includes 32 countries and is based on collective security, meaning an attack on one member is treated as an attack on all.

Trump’s threat comes amid frustration that NATO has not supported the US in its war against Iran.

He has repeatedly called the alliance “a paper tiger,” arguing that Europe relies on US protection while failing to contribute adequately to defence budgets.

Trump’s past statements have labelled NATO “obsolete” and accused European members of “ripping off” the US.

Despite these criticisms, NATO has played a significant role in global security, including military action in Afghanistan after 9/11, deterring Russian advances in Ukraine, and preventing aggression in the Balkans during the 1990s.

Experts argue that Trump’s characterisation of NATO is exaggerated and often aligns with Russian interests.

The US provides Nato allies with nuclear protection, numerous military bases across Europe, and a strategic presence in Turkey.

Any attempt to withdraw or reduce US participation would face legal and political hurdles, including legislation requiring congressional approval.

However, analysts warn that Trump could still weaken the alliance by removing troops and officers from Nato command structures without formally leaving the organisation.

While European leaders have raised defence spending to meet Trump’s demands, tensions remain high, and his continued criticism has forced Nato to navigate an unprecedented political challenge from its most powerful member.