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

Denmark deploys additional troops to Greenland after President Donald Trump claims the island is not secure from Russia or China.

A Congressional delegation is visiting Denmark to offer support to the country and NATO allies as Trump continues his push to take Greenland.

President Trump was reportedly outraged over the deployment of European troops to Greenland for military exercises, which some government officials believe may have escalated tensions between the

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

As part of the move, which the Trump administration has communicated to some European capitals, the U.S. will eliminate roughly 200 positions from the NATO entities that oversee and plan the alliance's military and intelligence operations, said the sources, who requested anonymity to discuss private diplomatic conversations.

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

Trump tells Norway's Jonas Gahr Støre denied Nobel frees U.S.-first focus, demands NATO hand over Greenland amid Russia threats and tariff plans on 8 allies. Denmark rejects blackmail; Europe eyes retaliation.