The president-elect’s latest proposal places politicians in Copenhagen and the Greenlandic capital of Nuuk in a great bind.

Copenhagen has been deliberating over how to respond to statements by US President-elect Donald Trump about his desire to annex Greenland, amid indications that these remarks are not merely jokes. Danish officials have reportedly received signals from Trump’s advisors and allies suggesting that he is serious about his plans.

President-elect Trump has made ambitious promises to end Russia’s war in Ukraine and face down China, but he’s also contending with a growing threat of “gray zone” attacks from foreign adversaries, from drone surveillance to acts of sabotage in the air, sea and on land. These hybrid tactics are intentionally hard to trace, and NATO…