US President Donald Trump said he had agreed to a meeting of “various parties” over Greenland at the World Economic Forum in Davos, after holding a “very good” telephone call with Nato secretary-general Mark Rutte.

For context: A source close to French president Macron said this morning that Donald Trump's threats to impose 200% on French wine and champagne over France's intentions to decline the US leader's invitation to join his "Board of Peace" are "unacceptable".

Some protesters expressed fears that if they spoke out about Trump, his administration could bar them from visiting the United States.

The president fired off a series of posts well after midnight that included private messages from world leaders.

Stocks tumbled in early trading on Tuesday as President Donald Trump threatened tariffs on multiple European countries as part of a push for U.S. control of Greenland. The Dow Jones Industrial Average fell 550 points, or 1.1%, while the S&P 500 declined 1.2%. The tech-heavy Nasdaq dropped 1.3%.

The Dow tumbled more than 600 points on Tuesday as investors assessed the impact of Trump's intensifying push to take control of Greenland.

One Copenhagen clothing store's tongue-in-cheek take on U.S. President Donald Trump's red baseball caps has become an unlikely symbol of Danish solidarity with Greenland, as protests mount over Trump's demands to buy the vast self-governing territory.

The organization Support Greenland is selling merchandise that benefits Greenlandic causes, like youth resources and sustainable tourism.

The US president insists Norway controls who gets the coveted prize, while the Norwegian government says it has nothing to do with the decision.

Trump has argued that the Arctic island is critical for U.S. security given threats posed by Russia as well as China.