King Charles III, during his state visit to the United States, addressed a joint session of the United States Congress and called for renewed global resolve to support Ukraine amid the ongoing conflict. Drawing a parallel with the response of the United States after the September 11 attacks, he emphasised that a similar level of determination is now required to defend Ukraine and secure what he described as a just and lasting peace.
In his remarks, the King highlighted the importance of unity between Europe and the United States, stating that the transatlantic alliance remains critical in addressing present-day security challenges. He underscored that cooperation across defence, intelligence, and diplomacy is essential at a time of heightened global uncertainty, positioning the partnership as more significant than at any point in recent history.
He also outlined the United Kingdom’s evolving defence posture, noting that Britain is increasing its military spending and capabilities to respond to emerging threats. By referencing historical cooperation, he reminded lawmakers that the UK stood firmly alongside the US after the 9/11 attacks, including support through NATO under its collective defence framework. He reiterated that the same spirit of solidarity continues today.
The King further stressed the importance of NATO as a cornerstone of shared security, recalling that its Article 5 clause—committing members to collective defence—was invoked only once, following the 2001 attacks on the United States. He also referenced ideas associated with Henry Kissinger regarding the enduring nature of the Atlantic partnership, emphasising that defence collaboration and strategic alignment remain central to that relationship.
In addition to geopolitical themes, King Charles addressed domestic concerns in the United States by condemning recent violence, including an attempted attack at the White House Correspondents’ Dinner. He affirmed that democratic institutions must be protected and stated that acts of violence would not succeed in undermining stability.
His address carried historical significance, as he became only the second British monarch to speak before the US Congress, following Queen Elizabeth II in 1991. He used the occasion to reflect on the shared heritage and longstanding ties between the two nations, framing them as a foundation for continued cooperation in addressing global challenges.
