Greenland is more of a strategic holding, I can see that one, the Panama Canal too. We should've never given that up.
Canada? We should've fought for that when we were still expanding during the 17&1800s. That's wasted time, I agree. If we do go after it, I say we turn it into a giant prison state. LOL, but I think he was just threatening to buy it so they conformed with immigration policies.