President Trump ratcheted up his feud with European leaders on Tuesday, firing off a series of mocking social media posts that reinforced his designs on Greenland, as he risked damaging the longstanding trans-Atlantic diplomatic alignment beyond repair.
A day before he was scheduled to join allies at the World Economic Forum in Davos, Switzerland, Mr. Trump insisted that the United States must have Greenland, the semiautonomous Danish territory, repeating a persistent demand that has shaken the foundations of the NATO alliance. “There can be no going back,” he wrote in one of a series of posts on his Truth Social platform.
In another post, he shared messages from President Emmanuel Macron of France, who said, “I do not understand what you are doing on Greenland.” A senior French official confirmed that the messages were authentic.
The tensions over Greenland threatened to dominate the meeting in Davos. Speaking there later Tuesday morning, Ursula von der Leyen, the president of the European Commission, suggested that the European Union would take steps to bolster its security in light of the crisis and would be looking at “how to strengthen our security partnerships with partners such as the U.K., Canada, Norway, Iceland and others.” She did not offer details.
Ms. von der Leyen also argued that Europe needed to change to adapt to a more hostile era, saying, “Nostalgia will not bring back the old order.”
Faced with Mr. Trump’s threats, including a warning that he will impose new tariffs on nations that oppose his territorial demands, European leaders have scrambled to formulate a response and were expected to gather in Brussels this week to come up with a way to answer Mr. Trump’s provocations.
