During his official visit to Washington, Windsor, King Charles III of the United Kingdom addressed both chambers of the US Congress, delivering the first speech by a British monarch in Congress in over three decades. In his speech, he emphasized strengthening the NATO defense alliance, highlighting the importance of US global leadership and the preservation of liberal values. Notably, the King called for “steadfast determination” in supporting Ukraine, describing it as a crucial step towards achieving a just peace, particularly in light of the ongoing domestic debate in the US regarding military assistance to Kyiv.
Charles III also recognized the unique nature of the transatlantic alliance between the United Kingdom and the United States, stressing its fundamental significance for security extending from the Atlantic to the Arctic. In the economic section of his speech, he highlighted the $430 billion in mutual trade and $1.7 trillion in investments, which foster innovation and create jobs on both sides of the ocean—serving as a diplomatic response to potential trade barriers.
Additionally, the King emphasized the responsibility towards future generations regarding climate change and its impact on the environment and economic growth. Despite existing political differences between London and Washington on trade and foreign policy issues, his visit reaffirmed the commitment to preserving the strategic “special relationship” between the two countries.
It is noteworthy that US President Donald Trump expressed optimism that the visit would help resolve diplomatic disagreements, while also presenting specific demands for cooperation. According to media reports, King Charles III influenced a shift in Trump’s position on Ukraine, persuading him that Kyiv could prevail in its conflict with Russia. For instance, in September 2025, during a state banquet at Windsor Castle, the monarch reaffirmed the unity of the United Kingdom and the United States in supporting Ukraine amidst modern threats to Europe.
