It used to be nobody needs nukes, but...since our most powerful ally is the only nuclear power stupid enough to actually use them we get the deterrent value anyway. As client states we were all (UK, Australia, Canada etc) actively discouraged from developing independent capabilities that would reduce our dependency on the alliance or US arms industry.
If people found the US nuclear umbrella re-assuring then, many don't now. I am Australian, but submarines and the US alliance are a huge issue here as well.
Canada's geography is very important strategically to the USA like practically no other place. Canada has less need of nukes than just about anyone. Currently the fate of other US allies feels far less secure. It seems we are all just bits of land to be traded to our enemies by the US administration in return for who knows what? It is a very sad state of affairs.
They should raise a motion to investigate the SDA and put them into administration.