President Trump has doubled down on threats to take control of Greenland. He will partly use a trip to the World Economic Forum in Switzerland to further press his case amid deep European skepticism.

President Trump is addressing the gathering of world leaders, CEOs and policymakers as America's allies balk at his efforts to acquire Greenland.

"They're not there for us on Iceland, that I can tell you," the president said in a remark that appeared to be about Greenland.

U.S. President Donald Trump on Wednesday called for immediate negotiations toward a deal to acquire Greenland, adding that he would not use force in his campaign for the northern island.

Trump said that he planned to meet with European leaders and NATO Secretary General Mark Rutte at the World Economic Forum. "As I expressed to everyone, very plainly, Greenland is imperative for National and World Security," Trump said in a social media post. "There can be no going back – On that, everyone agrees!

There were grave warnings from European leaders and expletives from California Gov. Gavin Newsom on Tuesday as leaders at the World Economic Forum grappled with the Greenland crisis and heightened concerns over global trade.

As European leaders try to engage with the American president over Greenland and the future of Ukraine, he is mocking them as weak.