King Charles III is embarking on a state visit to the U.S. following his mother's example of celebrating the shared democratic traditions between Britain and the United States. This comes amid tensions surrounding Prime Minister Keir Starmer's refusal to support U.K. President Donald Trump's war against Iran. The four-day trip includes a commemoration of the 250th birthday, a ceremony honoring fallen service members and an event attended by Queen Camilla. Douglas Brinkley, a presidential historian at Rice University in Texas, highlighted the deep bonds between the two nations. Despite the tensions, President Trump has continued to speak warmly about Charles.