Denmark, Greenland and other NATO allies remain staunchly opposed to President Trump's efforts 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.

The White House and Denmark contradicted each other in public about what they had agreed to this week as President Trump continued to demand U.S. ownership of Greenland.

A senior Greenland government official says it’s “unfathomable” that the United States is discussing taking over a NATO ally, and urged the Trump administration to listen to voices from the Arctic island nation.

But a number of concerned European officials and a growing, bipartisan contingent of lawmakers in Washington believe that Trump’s insistence that the U.S. take Greenland over the objection of Denmark,