US president Donald Trump has doubled down on his threats to take control of Greenland, saying on social media that there is 'no going back' and that 'Greenland is imperative'.

During a news conference at the White House, Trump was asked how far he was willing to go to acquire Greenland and replied, You'll find out.

Meanwhile, French president Emmanuel Macron warned at a meeting at the World Economic Forum in Switzerland of a 'shift towards a world without rules', while Canadian Prime Minister Mark Carney said the 'old order is not coming back'.

Trump is due to arrive in Davos on Wednesday, where he has said there are 'a lot of meetings scheduled on Greenland'.

During the lengthy press briefing, Trump also told reporters that 'things are going to work out pretty well' in Greenland.

Asked by the BBC whether the possible break-up of the NATO alliance was a price the president was willing to pay for Greenland, he responded, Nobody has done more for NATO than I have, in every way, adding that 'NATO is going to be happy and we are going to be happy,' insisting, 'We need it for world security.'

Trump has not ruled out using military force to acquire Greenland; when NBC News asked yesterday whether he would use force to seize the territory, the president replied no comment.

Greenland's Minister of Industry and Natural Resources, Naaja Nathanielsen, stated in an interview that Greenlanders were 'bewildered' by the president's demands, asserting, We do not want to be Americans, and we have been quite clear about that.

As global tensions mount, Trump's insistence on pursuing Greenland raises questions about international relations and the potential for reevaluating geopolitical alliances.