I don't think anyone who's paying attention is worried about some thread of absorption. Trump was making fun of Trudeau when he was saying Canada wouldn't survive without the US's help.
I don't make a habit of ignoring major world powers when they threaten annexation, and many others who are "paying attention" don't either.
Trudeau is no longer here, those threats continue to be made, even in the _presence_ of the current leader of Canada. I don't understand how one could not take these threats seriously.