Can a Royal Visit Salvage the Unraveling U.S.-UK Alliance?

(Matthias Matthijs – Council on Foreign Relations) King Charles III’s state visit to the United States from April 27–30 arrives at a particularly fraught moment. The four-day trip, his first as monarch, will feature all the expected rituals: a state dinner at the White House, an address to a joint session of Congress, and symbolic gestures designed to showcase shared history and enduring ties. But the political context threatens to overshadow the spectacle. The visit coincides with the 250th anniversary of U.S. independence—an anniversary that underscores both the depth and tension of the Anglo-American relationship. More importantly, it comes amid one of the most strained periods in transatlantic ties in decades. The relationship between Washington and London has deteriorated in the fifteen months since U.S. President Donald Trump returned to the White House. He has publicly criticized Keir Starmer’s Labour government on multiple fronts: accusing it of weakness on immigration, deriding its use of windmills to generate energy, faulting its lack of support in the U.S.-Israeli war against Iran, and threatening economic retaliation over the UK’s supposedly “unfair” digital services tax. Trump has even suggested that U.S. security guarantees might not extend as readily as before, which is a striking departure from decades of alliance orthodoxy. These tensions reflect deeper divergences over core strategic questions. On Iran, London has been much more cautious than Washington. It has questioned the wisdom of the war and limited its military assistance, including initial reluctance to allow the U.S. military to use its Diego Garcia naval base in the Chagos Archipelago in the Indian Ocean. On trade, Britain remains committed to lower tariffs and existing regulatory frameworks, including on digital policy, that clash with U.S. preferences. On climate, the UK is a leading proponent of the transition from fossil fuels to renewables at a time when the Trump administration has repudiated its predecessor’s green energy agenda and gutted its signature Inflation Reduction Act. And on NATO, disputes over burden-sharing and operational support—such as the supply of war ships for missions to help secure safe passage in the Strait of Hormuz—have further strained transatlantic cooperation. – Can a Royal Visit Salvage the Unraveling U.S.-UK Alliance? | Council on Foreign Relations