I think with most of his outlandish comments there's another motive generally around negotiation or a counter , so in the case of Canada , which has run it's economy into the ground , doesn't invest in oil and gas hardware and can only really sell at bottom book to the yanks. Canada also relies on the US for defence and their spending reflects that , and the fact that they've apparently let a large number of illegals cross into the US. There's a decent podcast about Panama, Greenland, chagos etc I'll have a look for it.