By Jacob Gronholt-Pedersen and Soren Jeppesen NUUK, Jan 23 (Reuters) - Denmark's Prime Minister Mette Frederiksen visited Greenland on Friday in a show of support for the Arctic island that U.S. President Donald Trump wants to annex.

The past year has been marked by ebbing and flowing of tensions in Europe and Canada over the U.S.'s commitment to NATO.

Leaders of Denmark and Greenland insisted Thursday that the island's sovereignty was nonnegotiable after U.S. President Donald Trump said he had agreed with the NATO chief on the framework of a future Arctic security deal that Trump said would grant the U.

By Stine Jacobsen COPENHAGEN, Jan 22 (Reuters) - Danish Prime Minister Mette Frederiksen said on Thursday that Denmark and Greenland remain open to constructive dialogue on Arctic security provided discussions respect her country's territorial integrity.

Veteran diplomat tells CBS News Denmark "ready to cooperate" on Greenland, and he expects U.S. to abandon "anachronistic approach of colonialism" post-Trump.

In a Truth Social post, President Trump suggested putting the world’s strongest military alliance “to the test” by invoking its mutual defense clause.

NATO Secretary-General Mark Rutte met with officials from Denmark and Greenland on Monday to discuss “collective security” as President Trump pushes to acquire the semiautonomous Danish

Shaheen said the Trump administration's reported interest in taking over Greenland has prompted strong reactions abroad.