U.S. President-elect Donald Trump says he wants to make Greenland a part of the United States and does not rule out using military or economic power to get Denmark to hand it over.

It’s been a while since Denmark has been the object of Donald Trump’s enduring obsession with Greenland and needing to remind the returning president repeatedly that the world’s largest island isn’t for sale.

A Danish foreign minister said Wednesday Denmark is “open to a dialogue with the Americans on how we can cooperate, possibly even more closely than we already do, to ensure that American ambitions are fulfilled,