Yeah I basically agree with your point about the unpleasant logic behind such a move, and would only add that Greenland looks appealing if you’re trying to lock down the arctic from both sides of the continent—US has good arctic frontage on Alaska, and Greenland would bookend Canada and allow US more flexibility in countering Russia and expanding oil extraction.

I was trying to think about where this suddenly came from, and the first thing that kept popping up was Trumps current obsession with drill baby drill, the arctic is the last frontier for potentially easy extraction once all the ice melts and Canada, US and Russia have already been playing footsie there for a decade under the guise of science and commercial traffic trying to lay claim to stuff that was ignorable before.

Like some dude got in his ear and convinced him the future is in the arctic. It also adds some further explanation to Trump “joking” about making Canada a state. If it was just economic hardball / a new trade deal, they could leave it at tariffs and the like, but they keep saying they want to make it a state…

All of that makes me sick to my stomach, but as you say there is logic to it.