The Danish PM's tour of three capitals betrayed the nervousness felt in Denmark over Trump's repeated comments.

Frederiksen didn't directly mention Trump's threat in comments at a meeting with German Chancellor Olaf Scholz, but said that “we are facing a more uncertain reality, a reality that calls for an even more united Europe and for more cooperation.

Frederiksen was meeting on Tuesday with European leaders including German Chancellor Olaf Scholz, French President Emmanuel Macron and NATO Secretary General Mark Rutte.

Denmark's prime minister plans stops in Berlin, Paris and Brussels on tour of European capitals as Copenhagen moves to strengthen its presence in Greenland.

Danish Prime Minister Mette Frederiksen sought to drum up support from European allies to stand up to Donald Trump’s efforts to appropriate Greenland, as she tried to project unity while avoiding antagonizing the US president.