President Donald Trump said King Charles III agrees that Iran should not possess a nuclear weapon during a state banquet in London this month [1, 2].

The statement arrives as the U.S. president seeks to bolster his hard-line stance on Iran's nuclear program by citing the support of a key Western ally [3, 4].

Trump made the comments during his visit to the United Kingdom in April 2026 [1, 4]. He said, "King Charles agrees with me that Iran should not have a nuclear weapon" [1]. The remarks were delivered at Buckingham Palace, where the two leaders met for a formal state banquet [1, 2].

Responses to the president's claim have been mixed. Rita Panahi of Sky News Australia said the response from Buckingham Palace sounded like a "yes" to her [2]. However, a spokesperson for Buckingham Palace said to Al-Monitor that the palace has not confirmed any such comment from the king [4].

This discrepancy highlights the tension between the president's public assertions and the traditional neutrality of the British monarchy. The palace typically avoids commenting on specific foreign policy disputes, a protocol that often contrasts with the direct communication style of the U.S. executive branch.

Trump has consistently emphasized the need to prevent Iran from achieving nuclear capabilities [3, 4]. By linking this position to the British monarch, the president attempted to present a unified front between the U.S. and the U.K. on the issue.

"King Charles agrees with me that Iran should not have a nuclear weapon."

This incident underscores the diplomatic friction that occurs when a U.S. president attributes specific policy positions to a constitutional monarch. While the U.S. seeks explicit alignment on security issues like nuclear proliferation, the British Crown maintains a strict policy of political neutrality. The lack of a formal confirmation from Buckingham Palace suggests that the president's claim may be an interpretation of a private conversation rather than a coordinated policy statement.