Isn't it unconstitutional to make Canada the 51st state?

Canada is not a unified country. Many people in Ontario descended from the United Empire Loyalists and therefore have a real animosity towards the US. People in Alberta had a very different experience where many American families moved to Alberta for better opportunity and therefore have a much more positive view toward the US. The problem is that the US is such a gong show now who would want to be part of it. Not that Canada is any better but at least Canada is not out starting stupid wars all over the world like the US is.