European leaders are concerned about Donald Trump's victory in the US presidential election and its implications for NATO. While some EU heads of state congratulated Trump, they emphasized the need to protect Europe's interests. Trump has criticized NATO and linked US defense support to European spending. NATO chief Mark Rutte highlighted the importance of a united alliance amid global challenges, while others like Marko Mihkelson stressed the need for Europe to be prepared to defend itself. The US remains the largest NATO funder, but faces a debt crisis that could impact defense spending. European nations are increasing their defense budgets, with Poland significantly raising its expenditure. Concerns about US support for Ukraine under Trump’s presidency are also prevalent, particularly regarding military aid and the future of NATO's role in global security.