Ottawa (AFP) — King Charles III was set to land in Ottawa Monday for a historic visit to open Canada’s parliament, a brief trip seen as part of the pushback against US President Donald Trump’s annexation threats.

The 76-year-old monarch, who is also Canada’s head of state as part of the Commonwealth, was invited by Prime Minister Mark Carney to deliver the throne speech, an address that outlines the government’s priorities.

The speech is typically given by the British monarch’s representative in Canada, the governor general.

Queen Elizabeth II, the king’s late mother, delivered a throne speech in Canada just twice during her long reign, in 1957 and 1977.

Charles, making his first visit to Canada since his coronation, has never commented on Trump’s repeated talk of making Canada the 51st US state.

But he will be closely watched for any comments on Canada’s sovereignty, as well as on trade.

Trump has slapped tariffs on Canadian goods including sector-specific levies on autos, steel and aluminum, rattling the Canadian economy — though he has suspended some of them pending negotiations.

Queen Camilla will accompany Charles on the 24-hour visit to Ottawa.

Carney has said his newly-elected government has been given a mandate “to define a new economic and security relationship with the United States,” a neighbor he believes Canada “can no longer trust.”

He has promised to curb reliance on trade with the United States by boosting internal commerce while forging deeper economic ties with allies overseas.

The government’s path to “build Canada strong” will be outlined in Charles’s speech, Carney said last week.

A government statement described the visit as “a momentous and historic occasion that underscores Canada’s identity and sovereignty as a constitutional monarchy.”