BRUSSELS (AP) — U.S. President Donald Trump’s threats to annex Greenland and impose tariffs on its backers pose a challenge to Europe’s security, principles and prosperity, European Council President António Costa said on Wednesday.

The EU chief offered to deepen cooperation with the US in Arctic region and termed imposing additional tariffs a "mistake."

The signal comes a day before EU leaders meet to find ways to respond to President Donald Trump’s Greenland grab and tariff threats.

Europe should take a “deep breath” and listen to Donald Trump’s arguments for seizing Greenland, the US said before the president’s keenly anticipated speech in Davos.

President Trump conceded the U.S. may not end up taking over Greenland, but said he's "getting everything" he wanted out of the Danish territory.

By Steve Holland, Stine Jacobsen and Janis Laizans DAVOS, Switzerland/COPENHAGEN/NUUK, Jan 22 (Reuters) - U.S. President Donald Trump's abrupt ‌climbdown ​on using tariffs as a weapon to seize Greenland ‌brought relief on Thursday,

Over the past 24 hours, President Donald Trump has appeared to refer to "Greenland" as "Iceland" nearly a half dozen times.