King Charles III highlights US-UK bond during busy day of diplomacy with Trump and Congress04/29/2026WASHINGTON (AP) — King Charles III has marked the 250th anniversary of American independence from Britain with gratitude that the two countries united to build “one of the most consequential alliances in human history.” Still, he is urging “that we ignore the clarion calls to become ever more inward-looking.” Charles' speech to Congress on Tuesday came amid tensions between President Donald Trump and British Prime Minister Keir Starmer over the war in Iran. Trump met with Charles and Queen Camilla at the White House earlier in the day and hosted them for a state dinner Tuesday night. The royal couple will continue their U.S. tour with stops in New York City and Virginia.