There was even a 'horrendous' phone call between Trump and Danish prime minister Mette Frederiksen that left officials in Denmark who'd been wondering how seriously to take Trump's rhetoric 'utterly freaked out' as they realised the US has a 'serious, and potentially very dangerous' interest in acquiring Greenland.

The story goes that Trump and Frederiksen spoke on the phone last week for about 45 minutes in what was expected to be a bit of a feeling-out between the two parties, given Trump’s very public declaration that he would like to take Greenland off Denmark’s hands.

Donald Trump has lashed out at the Danish Prime Minister during a "horrendous" 45-minute phone call as the duo discussed Greenland's future. The heated discussion has been described as "explosive" and was driven by Trump's demand that securing Greenland was required for national security purposes.