King Charles tells Congress US and UK 'stand united' as Trump-Starmer rift deepens

WASHINGTON. King Charles III told a joint meeting of Congress that the United States and United Kingdom "stand united" in defending democracy. The 30-minute address pressed the case for NATO and the Atlantic alliance at a moment when President Donald Trump is publicly feuding with British Prime Minister Keir Starmer over the Iran war.

The April 28 speech made Charles only the second British monarch ever to address a joint session of Congress. His late mother, Queen Elizabeth II, spoke in the same chamber in 1991. The setting carried more weight than the usual royal pageantry. British voters head to the polls Thursday in local elections across England, Scotland and Wales, a vote widely cast as a referendum on Starmer's leadership. The king's intervention has become a fixture of London's political backdrop in the days since.

"Whatever our differences, whatever disagreements we may have, we stand united in our commitment to uphold democracy, to protect all our people from harm, and to salute the courage of those who daily risk their lives in the service of our countries," Charles told the chamber.

The king argued, repeatedly and at times pointedly, that the postwar Atlantic partnership is "more important today than it has ever been". That line drew sustained applause from Democratic members. The response from Republicans on the other side of the aisle was visibly more reserved.

A pointed message in soft-power dress

Royal protocol forbids the monarch from intervening in politics. Foreign Policy magazine called the address a "fierce" and "oftentimes witty" 30-minute declaration that contained "several thinly veiled messages for the Trump administration", pointing to the king's defence of multilateral institutions and his warning about global warming.

Charles quoted Starmer directly. "As my Prime Minister said last month: 'Ours is an indispensable partnership. We must not disregard everything that has sustained us for the last 80 years. Instead, we must build on it'," the king said. He then called for the United Kingdom and the United States to "ignore the clarion calls to become ever more inward-looking". The phrase was aimed squarely at the isolationist current inside the Republican coalition.

The king never spoke the word Iran. He did press for "the defence of Ukraine and her most courageous people", a passage that drew a bipartisan standing ovation. He reminded lawmakers that NATO has invoked Article 5 of its mutual defence treaty only once in its history, in support of the United States after the September 11 attacks.

Trade, troops and a fraying friendship

Behind the pageantry sat a relationship under real strain. Trump has spent the past month attacking Starmer over the British government's refusal to send forces to support the US war against Iran. The president called the prime minister a "loser" in remarks reported widely in the British press. The White House has also slow-walked the next round of a US-UK trade and technology agreement that was supposed to be the centrepiece of Starmer's foreign-policy agenda.

Charles laid out the economic stakes in plain numbers. He cited $430 billion in annual trade and $1.7 trillion in mutual investment between the two countries, and described "millions of jobs on both sides of the Atlantic" supported by that activity. The figures were a reminder aimed at lawmakers more than at the White House. The alliance does measurable work even when the two governments are at odds.

The king also leaned on the security ledger. Thousands of US service members are stationed in the United Kingdom, he noted, and British personnel serve across 30 American states. The two countries are jointly building F-35 fighter aircraft. They have also agreed AUKUS, the trilateral submarine programme that ties Britain, the United States and Australia together for the next four decades.

A monarch in a contested chamber

The address came days after a gunman tried to attack Trump at a Washington media dinner on Saturday evening. Charles condemned the attempt without naming the president. "Such acts of violence will never succeed," he said.

The king nodded twice to his late mother. He stood "under the watchful eye of the Statue of Freedom" where Queen Elizabeth had stood in 1991, and described her chamber appearance as a "signal honour". He said the world today is "in many ways more volatile and more dangerous" than the one she addressed 35 years ago.

Charles cracked jokes throughout. He recalled the British tradition of taking a member of Parliament hostage at Buckingham Palace until the monarch returns safely from Westminster, and asked whether any in the chamber wanted to volunteer. He referenced the British troops who burned the Capitol building in 1814 alongside Trump's recent renovations of the White House. The king quoted Oscar Wilde on Britain and America having "everything in common" except language.

The king closed with Lincoln. He invoked the Gettysburg Address line that "the world may little note what we say but will never forget what we do". Then he asked the United States and the United Kingdom to "rededicate ourselves to each other in the selfless service of our peoples and of all the peoples of the world" on the country's 250th birthday. Members of Congress rose for a standing ovation.

What happens next

Charles is due to travel to New York later this week to mark the 25th anniversary of the September 11 attacks with families of the victims. He will return to London on the eve of Thursday's local elections, where Starmer's Labour government is bracing for losses to Reform UK and the Greens. UK 30-year gilt yields hit a 28-year high on Tuesday as traders weighed the war in Iran against the prospect of a Labour leadership challenge in the days after the vote.

Trump hosted Charles and Camilla at a state dinner at the White House on Tuesday night. The king presented the president with a ship's bell from a World War II vessel named Trump.