King Charles III and Queen Camilla touched down in Washington on Monday afternoon for the first British royal state visit to the United States since 2007, a trip shaped by personal diplomacy, heightened security, and a correspondence between the King and President Trump that stretches back years.
The visit commemorates both the 250th anniversary of American independence and the approaching 25th anniversary of September 11. But behind the ceremony lies a quieter story: a relationship between two heads of state maintained not through diplomatic cables or staff-drafted memos, but through handwritten letters exchanged over several years.
That personal channel, as The U.S. Sun reported, has become the quiet backbone of a US-UK relationship now under real diplomatic pressure. And it says something about how the most consequential alliances sometimes survive, not through summits and communiqués, but through the kind of personal effort most modern leaders no longer bother with.
First Lady Melania Trump described the origins of the relationship in her memoir. She wrote that in December 2019, during the NATO Summit in London, she and the President hosted an intimate dinner for then-Prince Charles and the Duchess of Cornwall at the US Ambassador's residence.
"Donald and I hosted an intimate dinner in honor of Prince Charles and the Duchess of Cornwall at the US Ambassador's residence."
That dinner followed Trump's 2019 state visit to the United Kingdom, which included a banquet and meeting with Queen Elizabeth II at Buckingham Palace for a D-Day commemoration. The two couples had also met the Queen for tea at Windsor Castle in July 2018.
After the 2019 state visit, Charles, then still Prince of Wales, kept in touch with the Trumps through handwritten letters. The First Lady confirmed the practice directly, writing that the exchange continued well beyond those initial meetings.
"We exchange letters with King Charles to this day."
She called the correspondence "a perfect expression of the enduring ties between our nations." That's a notable phrase from a First Lady not known for diplomatic overstatement.
The letter-writing became more than social courtesy after Charles ascended the throne in September 2022, following the death of Queen Elizabeth II. At age 73, he was the oldest person to assume the British throne. His coronation followed in May 2023. As the King confirmed his acceptance of Trump's invitation for this state visit, the personal channel between the two men was already well-established.
The correspondence took on a weightier dimension in July 2024. After Trump survived an assassination attempt at a campaign rally in Butler, Pennsylvania, Buckingham Palace confirmed that Charles sent the President a private letter. The contents were not disclosed publicly.
The British Embassy in Washington delivered the King's letter to Trump. The BBC reported it was understood to express sentiments similar to public messages of best wishes for Trump and condolences for the other victims of the rally shooting.
Royal commentator Richard Fitzwilliams, speaking to The U.S. Sun, said the gesture mattered.
"It was also much appreciated that the King wrote to the President after the assassination attempt in 2024."
Fitzwilliams added that the royal family's own history with threats gave the letter personal weight. He noted that "members of the royal family, including the late Queen, whom the President so admires, have also faced threatening situations in public, especially when there was a kidnap attempt on Princess Anne in 1972."
Then came January 2025. Trump began his second term as President, and Charles sent a personal message of congratulations on his inauguration. A month later, Trump showed off a typed letter from the King, complete with handwritten notes, while meeting with British Prime Minister Keir Starmer in the Oval Office. Trump described Charles as "a great, great gentleman" and complimented his "beautiful" signature.
The New York Post confirmed the Palace's acknowledgment of the July 2024 letter, noting that sources described the King's message as "in keeping" with Prime Minister Starmer's public statement condemning the attack and wishing Trump and his family well.
And this past weekend, after yet another attempt on the President's life, Charles sent Trump another letter. The massive security operation surrounding the visit reflected the seriousness of the threat. A spokesperson said His Majesty was "greatly relieved" to hear that the President, First Lady, and all guests were unharmed. Cole Tomas Allen, the suspected shooter, was formally charged on Monday with three felony counts, including the attempted assassination of the President, discharging a firearm during a crime of violence, and interstate transportation of weapons with felonious intent.
Despite calls over the weekend to cancel the trip on security grounds, Buckingham Palace decided to proceed, making only "minor adjustments" and increasing the security presence.
The itinerary is dense. Charles is set to have a private one-on-one meeting with Trump in the Oval Office. The royals will tour a newly expanded beehive on the White House South Lawn. On Tuesday, Charles will deliver a speech to both houses of Congress, only the second time a British monarch has done so, following Queen Elizabeth II's address in 1991.
On Wednesday, Charles and Camilla will travel to New York, where they plan to visit the 9/11 Memorial to meet first responders and families, and stop in Harlem for community projects. The trip will conclude with a visit to Virginia featuring cultural performances, followed by a trip to Bermuda. It's a four-day state visit with historic scope.
Fitzwilliams framed the visit in blunt terms. He called it an "extremely pivotal state visit, but also an extremely stressful one."
"When the two heads of state have a one-to-one in the Oval Office, a lot is at stake."
But he argued the personal rapport would carry the day. "There will, without question, be mutual respect and the King will undoubtedly admire the President's amazing public panache after this scarifying attempt on his life," Fitzwilliams said. "This can only help a relationship that, at its core, surely remains very special."
Fitzwilliams also pointed to Trump's consistent admiration for the royal family. "There's no question President Trump is an admirer of the royal family. He's been totally consistent in this," he said. He noted Trump's connection to Scotland, where his mother was born, and his individual fondness for Charles, built through the letters.
That fondness has extended to the broader royal family. In December 2024, Trump and Prince William had a private 40-minute meeting in Paris after the reopening of Notre-Dame Cathedral. Trump had earlier been preparing a grand welcome for Charles as the state visit took shape.
Royal expert Kinsey Schofield told The U.S. Sun that the visit is about more than ceremony. She described it as aimed at "steadying and reinforcing the special relationship between the United States and the United Kingdom at a moment of real tension."
"These visits don't happen by accident, they're government-directed, and right now the King is being deployed as a diplomatic asset."
Schofield said Charles is "uniquely positioned to help smooth relations, particularly with President Trump, using that access and long-established rapport to keep lines of communication open where politics may have strained them."
She acknowledged the difficulty of following Queen Elizabeth II, who had decades to build her connection with the American public. "King Charles doesn't have the same emotional connection here that the late Queen did, but there's goodwill," Schofield said. "Charles absolutely has big shoes to fill, but he doesn't need to replicate her; he just needs to be consistent and visible."
Schofield also addressed the pressure some would place on Charles to confront the President on political matters. "He's in a difficult position because there will be some people who want the King to be aggressive and stand up against some of President Trump's recent decisions, but that's not the role of the monarch, and it's simply not the King's personality."
Fitzwilliams made a similar point, noting Charles is "not an activist king, because you can't be under our constitution. Nonetheless, he has enthusiasms, and he has particular issues that he champions." He described Charles's transition from Queen Elizabeth's legacy as a difficult mantle carried "very sensitively."
The King's arrival at Joint Base Andrews marked the formal start of a visit that will test whether personal rapport can still anchor an alliance when political headwinds blow hard from both sides of the Atlantic.
Schofield summed up the broader significance plainly: "The royal family offers cultural diplomacy, visibility, and frankly, global attention. That still has real value." She added, "The King is showing he's not a placeholder, he's an active global figure. Early in his reign, that matters."
Fitzwilliams said what matters most is that the visit goes smoothly. He described the task of maintaining the special relationship as a "Sisyphean feat", but one that both sides appear committed to pulling off.
In an era when most diplomacy is reduced to press releases and social media posts, there's something worth noting about a king who still picks up a pen. And a president who keeps the letters.
