In a post on his social media site, Trump said he had agreed with the head of NATO on a "framework of a future deal" on Arctic security, potentially defusing tension that had far-reaching geopolitical implications

He said "additional discussions" on Greenland were being held concerning the Golden Dome missile defence programme, a multilayered, USD 175 billion system that for the first time will put US weapons in space

In a subsequent interview with CNBC, Trump offered few details but described the agreement reached as a "forever deal" and boasted, "Now we`re going to have even better security than we would have had before"

The president has threatened tariffs before only to back away. In April, after first saying he would slap massive import levies on nations from around the world, which prompted a sharp negative market reaction, Trump eased off

But his change of heart this time came only after he used his speech at the World Economic Forum in the Swiss Alps to focus on Greenland and threatened to upend NATO, an alliance that has been among the globe`s most unshakable since the early days of the Cold War