Danish Prime Minister Mette Frederiksen has warned that the U.S takeover of Greenland would mean an end to the alliance.

Poland's prime minister is worried about the strain the United States' threat to take over Greenland is putting on NATO, he said on Friday, adding that as a loyal ally Warsaw should be honest with Washington about its concerns.

Top Trump aide Stephen Miller says it's the "formal position" of the White House that Denmark's territory of Greenland "should be part of the U.S."

WASHINGTON — Sen. Lisa Murkowski said the Trump administration is engaged in “pretty aggressive rhetoric” about possibly seizing Greenland, which she says would be a “colossal mistake.”

Leaders reaffirm support for Ukraine, discuss NATO’s role in the High North amid Russian threats - Anadolu Ajansı

The leaders of Canada, France, Germany, Italy, Poland, Spain and the U.K. joined Denmark’s Prime Minister Mette Frederiksen on Tuesday in defending Greenland’s sovereignty in the wake of Trump’s comments about Greenland, which is part of the NATO military alliance.

Former U.K. national security official and ABC News contributor Steve Hill discusses reports that the U.S. is seeking to purchase Greenland.

People in Greenland are worried about President Trump’s threats to take control of the semiautonomous territory after the US are set to meet Danish ministers next week.