Trump has previously criticized NATO, calling it a 'bad deal' and suggesting he might not protect member states that don't meet defense spending targets. His rhetoric raises concerns about the future of the alliance, especially amid the ongoing war in Ukraine.
The US contributes about 15% of NATO's budget and provides the majority of its military clout, including a nuclear umbrella and significant troop presence in Europe. Without the US, NATO would be significantly weakened.
Ukraine depends heavily on NATO member states, particularly the US, for weapons and ammunition. Without this support, its ability to sustain the war effort would be severely compromised.
NATO has not yet accepted Ukraine as a member, partly due to concerns that it could provoke further aggression from Russia. However, Ukraine strongly advocates for membership, citing historical precedents like Germany's post-WWII inclusion.
Rutte aims to flatter Trump by crediting him with forcing European countries to increase defense spending. He also emphasizes the strategic importance of NATO for US interests, particularly in countering global threats like Russia and China.
NATO leaders, including Rutte, warn that Russia could expand its aggression beyond Ukraine, potentially targeting NATO member states like Poland or launching long-range missile attacks. This underscores the need for increased defense spending and preparedness.
Europe lacks the military capabilities, nuclear umbrella, and financial resources to fully defend itself without the US. While some countries are increasing defense spending, it would take years to build the necessary infrastructure and capabilities.
US legislation passed last year requires congressional approval or a two-thirds Senate vote to withdraw from NATO, making it difficult for Trump to unilaterally pull out of the alliance.
Donald Trump's return to the White House is seen as a potential threat to European security. Some believe he could abandon the transatlantic military alliance Nato - but the organisation's new secretary general Mark Rutte seems convinced he will be persuaded to stay.
On this episode of The Global Story, Katya Adler speaks with the BBC's defence correspondent Jonathan Beale about what impact losing the alliance’s biggest financial backer would have on the war in Ukraine - and the reasons why the incoming US President might be convinced to remain in Nato.
Producers: Alice Aylett Roberts, Laurie Kalus and Eleanor Sly
Sound engineer: Philip Bull
Assistant editor: Sergi Forcada Freixas
Senior news editor: Sara Wadeson