King Charles III has won praise for his deft diplomacy and dealings with President Donald Trump in his visit to the United States. Is it enough?

The King arrives in the US in the wake of more political violence – and with the special relationship in its worst state for decades. But despite the backdrop, Charles is uniquely…

A rift between the U.K. government and Donald Trump over issues including the Iran war has raised the political stakes for the British monarch's visit.