[AnimalMuppet]

Lets just say that Russia or China does some surprise attack and lands a bunch of troops in Greenland.

OK, great, they've got troops in Greenland. Now they have to keep them supplied. How are they going to do that? Well, either through the air or by sea.

Does either have a navy that can do that? No. Does either have an air force that can do that against US opposition? No.

So it's really unlikely. Even if China or Russia were stupid enough to do that, they could never hold it.

Now, perhaps the more interesting question: How likely does Trump think it is? Does he think it's real, despite the absurd impossibility of it? Or is he just saying fact-free stuff that he hopes some people will believe?