I appreciate the Tyee squeezing every possible angle against this but...
trading partners take the threat of climate change seriously and use carbon tariffs to punish other countries they see as free riders
The US and they would be happy to see the carbon tax go away, so they don't have "communism" nearby, and we know that "trading partner" for Canada means mostly the US. The odds of Canada getting sanctioned for backtracking a 1 yr old tax is negligible.
This is addressed in the article (A greening American leviathan), but I won't be holding my breath. Even if carbon tariffs has bipartisan appeal for now, let's see what happens when the time comes.