King Charles will walk a diplomatic tightrope as he opens Canada's Parliament for the first time, 48 years after his mother.

What's likely to be the message when King Charles makes a speech in Canada?

U.S. President Donald Trump’s repeated suggestion that the U.S. annex its northern neighbor prompted new Canadian Prime Minister Mark Carney to invite Charles to give the speech from the throne on Tuesday where he will lay out the Canadian government’s agenda when Parliament reopens.