Trump’s repeated suggestion that the US annex its northern neighbour prompted Prime Minister Mark Carney to invite Charles to give the speech from the throne that will outline his government’s agenda for the new parliament.

As in Australia, the King is the head of state in Canada, which is a member of the Commonwealth.

“This historic honour matches the weight of our times. It speaks to our enduring tradition and friendship, to the vitality of our constitutional monarchy and our distinct identity, and to the historic ties that crises only fortify,” Carney said in a statement.

“Canada’s strength lies in building a strong future while embracing its English, French, and Indigenous roots — the union of peoples that forms our bedrock.”

Carney and Canada’s first indigenous Governor-General, Mary Simon, the King’s representative in Canada, will greet the King and Queen Camilla as well a 25-member honour guard from the Royal Canadian Dragoons, for which the King is colonel-in-chief.

Charles and Camilla’s presence “reaffirms the enduring constitutional bond that has shaped Canada’s journey into a proud and independent nation”, Simon said in a statement Monday.

“Their visit invites us to reflect on who we are and to celebrate our distinct national identity,” she said.

Canadians stress their differences from the US

It is rare for the monarch to deliver what’s called the speech from the throne in Canada. Charles’ mother, Queen Elizabeth II, did it twice in her 70-year reign, the last time in 1977.

Canadians are largely indifferent to the monarchy but Carney has been eager to show the differences between Canada and the US. The King’s visit clearly underscores Canada’s sovereignty, he said.

After America gained independence from Britain, Canada remained a colony until 1867 and afterward, continued as a constitutional monarchy with a British-style parliamentary system.

“We are different,” former Quebec Premier Jean Charest said.

“If you look at why King Charles is reading the speech from the throne, then you have to then acknowledge Canada’s story.”

However, the new US ambassador to Canada, Pete Hoekstra, said sending messages isn’t necessary and Canadians should move on from the 51st state talk, telling the Canadian Broadcasting Corporation that if there’s a message to be sent there’s easier ways to do that, such as calling him or calling the president.

Royal historian Carolyn Harris expects Trump to notice the visit because he has repeatedly spoken about his admiration for the royal family. Trump might see how different Canada is from the US.

“It is a very distinctive history that goes back to the waves of loyalists who settled here after the American revolution,” Harris said.

“And we’re going to seeing the kKng in a Canadian context, escorted by the Royal Canadian Mounted Police, surrounded by Canadian symbolism. This is very much King Charles III in his role as King of Canada.”

Royal invitation to Trump ruffles Canadians’ feathers

The speech, which will be delivered on Tuesday (Wednesday AEST), is not written by the King or his UK advisers as Charles serves as a nonpartisan head of state. He will read what is put before him by Canada’s government.

“Charles can only act with the consent and with the advice of his prime minister. But at the same time he cannot act in a way that would throw any of the other 14 Commonwealth realms under the bus. So it is finest tightrope to walk,” said Justin Vovk, a Canadian royal historian.

Canadians were not happy when UK Prime Minister Keir Starmer extended a state visit invitation to Trump on behalf of the King during a time when Trump threatened Canada’s sovereignty.

“They weren’t impressed by that gesture, quite simply, given the circumstance,” Carney told Britain’s Sky News.

“It was a time when we were quite clear … about the issues around sovereignty.”

The King has more recently been showing support for Canada, including displaying Canadian military medals on his chest during a visit to a British aircraft carrier.

After his arrival, Charles will drop the ceremonial first puck during a street hockey game. He will also attend a community event and meet with Carney. Camilla will also participate in a swearing-in ceremony to become a Canadian privy councillor, a lifetime appointment that allows her to give advice about the country to the King.

The King will return to the UK after Tuesday’s speech and a visit to Canada’s National War Memorial.