"So go ahead and withdraw from Paris, Mr. President. Your successor will override you. In the meantime, your country, and ours, and the world will carry on the fight against climate change without you. Your absence will not be missed."

I don't think Trump cares as it's not about Canada (or Moldova for that matter).
However, how many days do you think Canada will let pass before it grabs America's coat tails and uses this as it's excuse to slink away from the treaty?