King Charles III Praises U.S. Ties Amid Political Turmoil in Historic Congress Address

Key facts

• King Charles III addressed a joint session of Congress on April 28, 2026, only the second British monarch to do so.
• President Donald Trump called Charles 'the greatest king, in my book' and lifted some tariffs on Scotch whisky as a favor.
• The visit was timed to mark the United States' 250th anniversary of independence from Britain.
• Trump is in open conflict with U.K. Prime Minister Keir Starmer over the Iran war, dismissing Starmer as 'not Winston Churchill.'
• The king urged 'unyielding resolve' in backing Ukraine against Russia and heralded the NATO alliance.
• A shooting at the White House Correspondents' Dinner on Saturday was described as an attempted assassination against Trump.
• Charles was diagnosed with cancer in February 2024 and has since stepped back from public duties during treatment.
• The king slipped in public opinion polls, with four other royals surpassing him in popularity.

A Monarch’s Diplomatic Tightrope

King Charles III acknowledged 'times of great uncertainty' as he expressed gratitude to the American people during a speech to the U.S. Congress on Tuesday, marking the 250th anniversary of independence from Britain. The address, delivered in a chamber still unsettled by a recent assassination attempt on President Donald Trump, highlighted the enduring bonds between the two nations amid political turmoil. 'For all that time,' Charles said, 'our destinies have been interlinked.' The king is only the second British monarch to address a joint session of Congress, following his mother, Queen Elizabeth II, who spoke in 1991. His remarks came at a moment when Trump is in open conflict with U.K. Prime Minister Keir Starmer over the Iran war, and many lawmakers in the room had attended the White House Correspondents' Dinner on Saturday, which was disrupted by a shooting authorities described as an attempted assassination against Trump. 'Let me say with unshakeable resolve,' Charles declared, 'such acts of violence will never succeed.'

Subtle Nods to Divisions

Even as the king focused on common interests, his speech contained subtle references to issues that have divided the U.S. and the U.K., particularly in global affairs. He said the countries 'cannot rest on past achievements' as the Iran war tests their relationship, and urged 'unyielding resolve' in backing Ukraine against Russia while heralding the NATO alliance that Trump has repeatedly undermined. The address was a diplomatic master-class, mixing praise for his host with measured criticism. Earlier that day, Charles began at the White House, where he and Trump greeted each other warmly during a ceremony on the South Lawn under gray, drizzly skies. Trump quipped that it was a 'beautiful British day' before shifting focus to shared history, drawing a line from King John's sealing of the Magna Carta in 1215 to the American Revolution. 'American patriots today can sing, “My country, ’tis of thee, sweet land of liberty,” only because our colonial ancestors first sang, “God save the King,”' Trump said.

A Carefully Choreographed State Visit

The four-day trip to Washington, New York, and Virginia by the king and Queen Camilla was a carefully choreographed diplomatic event carried out at the request of the U.K. government. Timed to help mark the United States’ 250th birthday, it was a chance to heal rifts between the Starmer government and the Trump administration. Trump has lambasted Starmer over his unwillingness to join U.S. military attacks on Iran, dismissing Britain’s leader as 'not Winston Churchill,' the World War II prime minister who coined the phrase 'special relationship' for the U.K.-U.S. bond. On Thursday, Trump and first lady Melania Trump bid farewell to the royal couple as they left Washington for Virginia, the final stop of the visit. Trump called Charles 'the greatest king, in my book' and even lifted some tariffs on Scotch whisky as a favor to the British monarch. The president’s praise underscored the personal rapport between the two leaders, even as policy differences persist.

Uncertain Long-Term Impact

It remains unclear whether the visit will make a major difference to a trans-Atlantic relationship troubled by divisions over issues including the Iran war. 'In the short term probably yes, in the long term probably no,' said Kristofer Allerfeldt, a University of Exeter professor specializing in American history. He added that Charles had 'definitely clawed back some of the prestige of the monarchy' in his homeland with his assured performance. 'He’s done us proud,' Allerfeldt said. The king’s performance on the trip was widely seen as a diplomatic triumph, but the underlying tensions between the two governments remain. Trump’s criticism of Starmer has been sharp, and the prime minister’s refusal to join U.S. military actions in Iran continues to strain the alliance. The visit may have smoothed relations temporarily, but the fundamental disagreements over foreign policy are unlikely to disappear.

Charles’s Reign in Context

Charles acceded to the throne on September 8, 2022, following the death of his mother, Queen Elizabeth II. At age 73, he became the oldest person to become British monarch, bringing decades of experience to his role as King of the United Kingdom and 14 other Commonwealth realms. His coronation took place on May 6, 2023, at Westminster Abbey. Since becoming king, Charles has undertaken numerous official duties, including meeting with prime ministers, conducting state visits, and hosting foreign dignitaries. He has continued his lifelong commitment to environmental causes, recently speaking at COP28 about the urgent need for climate action. In February 2024, Buckingham Palace announced that the king had been diagnosed with cancer and would be stepping back from public duties during treatment. Despite this, he has maintained a public schedule, including this state visit. However, recent public opinion polls show Charles slipping in popularity, with four other royals surpassing him.

The Monarchy’s Place in the 21st Century

As a constitutional monarch, Charles plays a vital ceremonial and symbolic role in British public life. His path to the throne was marked by both triumph and controversy, from his 1981 fairytale wedding to Lady Diana Spencer to their subsequent divorce and his 2005 marriage to Camilla Parker Bowles, now Queen Camilla. His relationships with his sons, William, Prince of Wales, and Prince Harry, Duke of Sussex, have faced public scrutiny, especially following Harry and Meghan’s departure from official royal duties. The king has long been an advocate for interfaith dialogue and has expressed his desire as monarch to be a defender of all faiths. His interests in architecture, organic farming, and traditional arts continue to shape his public persona. As he navigates the monarchy’s place in the 21st century while upholding centuries of tradition, his performance on the world stage, as seen in this state visit, will be crucial in maintaining the institution’s relevance.

The bottom line

• King Charles III’s address to Congress was a diplomatic balancing act, acknowledging shared history while subtly addressing divisions over the Iran war and NATO.
• Trump’s warm personal reception of Charles, including tariff concessions, contrasts with his harsh criticism of Prime Minister Starmer.
• The visit’s long-term impact on U.S.-U.K. relations is uncertain, with experts suggesting it may only provide short-term relief.
• Charles’s performance has bolstered the monarchy’s prestige at home, even as his personal popularity slips in polls.
• The king’s ongoing cancer treatment underscores the personal challenges he faces while fulfilling his ceremonial duties.
• The state visit highlighted the enduring symbolic importance of the monarchy in diplomatic relations, despite underlying policy disagreements.