UK King Charles III is set to meet with US President Donald Trump for the toughest mission of his reign, tasked with helping to mend the relationship between the United States and Britain. This follows a period of tension between the two countries, with Trump criticising Britain's Prime Minister Keir Starmer for his refusal to assist the US in its war with Iran. King Charles will be in the US for a four-day state visit to mark the 250th anniversary of Britain's independence. The UK government hopes that this visit will help ease tensions with the US and other allies. Despite tensions, the royal state visit will proceed as planned following discussions on both sides of the Atlantic and acting on advice of Government.