U.S. stock futures sank before the opening bell on Tuesday following threats by President Trump over the weekend to impose tariffs on some NATO trading partners.

Several European countries have sent troops to Greenland in recent days, saying they are there for Arctic security training, but U.S. President Donald Trump downplayed that development.

The US president has pledged to tell European leaders at this week's forum in Davos, Switzerland, that "we will have to have" Greenland.

Netflix submitted an amended all-cash ‌offer ​for Warner Bros Discovery's studio and ‌streaming businesses, winning the unanimous support from the HBO owner's board without increasing the $82.7 ​billion purchase price,

President Donald Trump said Jan. 19 that he doesn’t care about the Nobel Prize as he doubled down on his aims for Greenland, ahead of his trip to the World Economic Forum in Davos, Switzerland, this week.

Donald Trump will not be able to force Greenland to change ownership, a former top adviser to the US president has told the BBC.

Europe is the US’ biggest trading partner, and tit-for-tat tariffs could slow American growth.