What does the US get from Canada that it can't already produce for itself - besides a ton of ntural resources?  Amereican jobs didn't flee' to Canada.  They fled to the contadora (some of them) and most fled to Asia. Aside from screwing with the contadora, which just raises prices unnecessarily, or keeps prices low by creating 'un-jobs' in the  USA, Canada should resisyt the change and switch to opening more foreign markets. And if necessaary remove trhe 'favored status' of the US in buying, or owning Canadian rsource industries. Slap some tarriffs on American imports (and Canadain investment in the US market),  and develop more Canadian production.