King Charles III of Britain is undergoing treatment for cancer. Prime Minister Rishi Sunak added to the public announcement that the health challenge had been “caught early.” Britain’s Royal Family is strongly connected to Americans, shown in extensive media coverage. This reflects the distinctive partnership that began in World War II. Predecessors Charles I and Charles II reigned in the revolutionary 1600s. The first was beheaded. The second restored monarchy after a bloody civil war, then dictatorship under Oliver Cromwell. National institutions since that era have enjoyed remarkable stability. Britain played a pivotal role in World War II, when the...