During his state visit, King Charles addressed a joint meeting of the U.S. Congress, highlighting the enduring partnership between the United States and the United Kingdom and calling for renewed cooperation on shared challenges. His remarks, met with sustained bipartisan applause, framed the alliance as grounded in common history, shared values and a mutual responsibility for global security.
The king urged continued support for NATO and appealed for assistance in defending Ukraine, stressing that collective resolve is essential to deter aggression and to preserve democratic institutions. He emphasized the strategic importance of the transatlantic relationship for deterrence, intelligence sharing and coordinated responses to emerging threats.
Beyond security, Charles pressed for deeper collaboration on climate change, conservation and public health, issues he has championed for decades. He called for strengthened scientific and technological partnerships to address environmental degradation, accelerate sustainable energy transitions and improve preparedness and resilience against future pandemics.
Acknowledging the deep cultural and economic ties between the two nations, the king praised the contributions of British and American service members, diplomats and civilians who sustain the partnership. He thanked Congress and the American people for their warm welcome and reiterated a commitment to deepen ties in trade, education and research.
Throughout the address he appealed for unity of purpose rather than partisan division, invoking shared democratic principles and the moral obligation of free nations to protect vulnerable people. Members of both parties responded with standing ovations at several points, underscoring the symbolic weight of the visit and the enduring nature of U.S.-U.K. relations.
The speech capped a series of events on the royal visit intended to reinforce diplomatic, economic and cultural bonds and to signal continued alignment on international security, climate policy and humanitarian concerns. The message was clear: facing global challenges, the two countries are strongest when they act together.