I suspect that Greenland won't be used for agriculture unless climate change makes it a LOT warmer. Surely Alaska farming would be a lot cheaper and easier
Greenland is a great way to test internal American resistance to Lebensraum politics. If that works, Canada is next.
The US must liberate Saskatchewan from the tyranny of Ottawa!
(do I really need to mention the gloves, here? Remember "Remember the Maine")
The most charitable take I can come up with is that D-Man is "exploring" alternatives to