The Danes have tried everything to pacify an unpredictable president. Now they may be reaching their red line.

As European troops land in Greenland, tensions rise over Trump's bold Arctic ambitions. The island's future hangs in the balance amidst international intrigue.

President Donald Trump on Wednesday cast the acquisition of Greenland as key to the Golden Dome missile defense project, writing on his social media platform that “the United States needs Greenland for the purpose of national security” and enlisting NATO for help in acquiring the self-governing region from Denmark.

Denmark’s foreign minister said on Wednesday that a “fundamental disagreement” with U.S. President Donald Trump over the future of Greenland remained unresolved after high-level talks in Washington, even as Denmark and NATO allies moved to increase their military presence in the Arctic territory amid rising tensions.

Denmark and Greenland said they had begun to increase their military presence around Greenland, as part of a promise to beef up Arctic defense.

Yesterday, after Greenland’s prime minister, Jens-Frederik Nielsen, vowed to cast his lot with Denmark over the United States, Trump said that he didn’t “know anything about” Nielsen but that such a choice would be a “big problem for him.”

President Donald Trump said Sunday that the United States will take Greenland "one way or another, and Europe is stepping up in defense.

Roughly 150 soldiers are currently stationed at Pituffik, formerly known as the Thule air base, with its year-round air operations. The base is vital for detecting and knocking out any missiles bound for the U.S. mainland, for monitoring space and for watching out for submarines.

A bipartisan, bicameral group lawmakers traveled to Denmark to reassure NATO ally amid President Donald Trump's push for the U.S. to acquire Greenland.

Denmark's foreign minister said the closed-door meeting was a "frank but also constructive" discussion. He said a high-level working group would be formed "to explore if we can find a common way forward.

In an interview, GOP Rep. Don Bacon slammed the president's efforts to take over Greenland, warning it could lead to his impeachment.