Politicians all over the world expressed dismay after the announcement that Charles had cancer. British Prime Minister Rishi Sunak wished Charles a speedy recovery.

US President Joe Biden said on the sidelines of a visit to Las Vegas that he was "concerned" and would call the monarch later. Canada's Prime Minister Justin Truadeus wrote that like Canadians across the country and people around the world, he was remembering Charles III.. The overview of the reactions to the news of King Charles III's cancer diagnosis.