It would be the most effective way to hurt Americans.

But it isn’t politically possible for Canada to do this. The two segments that would be most effective, oil & gas and potash happen to come from provinces that already have significant issues with the federal government. One is even flirting with separation, which would be inflamed by export taxes.

Canada is also very venerable to similar actions by the Americans. Refined oil products, fertilizers and oil & gas pipeline transit all come from the Americans.

It is fun to imagine Canada sticking it to the Americans with export taxes, but it will never happen.

The primary issue they have is not being allowed to become vassal states of US empire quickly enough.

"Western alienation" is created and maintained by American propaganda.