Denmark's Prime Minister Mette Frederiksen said on Tuesday following a meeting with French President Emmanuel Macron that political leaders in Europe and beyond have given full backing to maintain respects for international borders.

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.

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.

Trump has shown interest in making Greenland part of the US and has not dismissed the use of military or economic power.

BRUSSELS (Reuters) -NATO Secretary-General Mark Rutte and Danish Prime Minister Mette Frederiksen agreed at a meeting on Tuesday that allies need to focus on strengthening defences in the Arctic, a source familiar with the talks told Reuters.

Danish Prime Minister Mette Frederiksen's European tour aims to enhance Denmark's defence, especially around Greenland, following US President Donald Trump's hint at using force to take it over. The Danish government announced a $2 billion defence deal focusing on Arctic naval vessels,

German Chancellor Olaf Scholz has warned of the threat posed by hybrid warfare from Moscow after an underwater Baltic Sea cable was severed. Scholz was speaking as he met Danish Prime Minister Mette Frederiksen.

Frederiksen will meet German Chancellor Olaf Scholz in Berlin, French President Emmanuel Macron in Paris and NATO Secretary-General Mark Rutte in Brussels, during a whirlwind day of international diplomacy as Trump threatens to upend the polar security architecture.

US President Donald Trump has already reignited his interest in acquiring Greenland while claiming that the US will eventually secure the mineral rich island for sure, reported Daily Star.According to Daily Star,

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

Trump’s bid for the Arctic territory was laughed off as a joke. Now, it’s gaining traction and provoking jitters in Europe.