Canada

Personally, I feel like this is quite a level of escalation that I think is a bit too far for Canada. Nuclear proliferation is just incredibly risky, especially when it comes to normalizing the idea of more countries having nukes. If Canada gets nukes, then who are we to say that another country shouldn't also get nukes? What if that country is Iran, or Turkey, or some other country that has a notably loose concept of restraint while being next doors to a hostile country?

On the other hand, nuclear weapons is a form of protection that negates balance of conventional forces, and few imbalances are as great as that of Canada and the US.

For me, I think that we shouldn't get nukes, but a better idea is to help an existing nuclear power to reinforce their stockpile and come under their umbrella, like the UK or France. Canada is already one of the top uranium exporters and a major nuclear energy power, so there's little reason why we can't be a contributor to the building and maintenance of a friendly nation's nuclear stockpile in exchange for their protection.

Not to mention that it'll cut back the risk of proliferation.