Definitely the wrong response is to triple down on Ukraine, including throwing out the idea of sending soldiers.
Normalize relations with reset of world. US only protects Canada from Russia because Canada lets the US tell us who our enemies are. If Russia is not our chosen/fabricated enemy, then NORAD is Canada protecting the US.
The lies that Canada support for US consumers/industry is a cost to the US, or that it is responsible for fentanyl, should result in more public anger about liars, and breaking off relations with liars, instead of correcting facts as if that will make a difference.
Export tariffs on energy to make Canadian energy after tariffs the same price as WTI, or US electricity alternatives is crucial, even if auto tariffs are not reciprocated. FFS, make sure Canada's next harvest is sold to China or elsewhere undercutting US agriculture. The most disgusting reaction in all of this is no talks with China on anything.