That song is from the movie A Hole In The Head. Frank sang a modified version as a political song, but that was a different song sang in the same tune. The actual song was a big hit at the time. Singers changing lyrics to support candidates is still a thing.
Not saying he shouldn’t do it, but the US would have the power back very quickly and Trump would spin it to his supporters as an act of aggression. I don’t think most of the people who temporarily get inconvenienced would see it as a wake up call. America is too far gone. I say that as an American from Michigan that lives in Canada.
It will be a shit show until Canada and the rest of the western world work out agreements independent of the US.
I’m just an American that lives here, but I think he knew he was past his best by date in the eye of the public. The best thing to do was to take as much heat as possible on the way out. It was better for the party to let his successor take credit for publicly appeasing decisions. Poilevre is a snake oil salesman, and his snake oil was “Trudeau is the problem” and “Axe the Tax”. Trudeau eliminated himself and let his successor take credit for axing the tax. Just good politics.