Trump arrives in Switzerland, where his quest to own Greenland could overshadow his other goals

Happening today, President Trump is scheduled to meet with NATO allies at the World Economic Summit in Davos, Switzerland amid an escalating war of words over Greenland. The president is getting a delayed start due to some issues with Air Force One that happened late last night. ABC's Nicole D'Antonio has details from Washington. Overnight, Air Force One forced to turn back after a minor electrical issue. President Trump switching planes ahead of a World Economic Summit speech in Davos, Switzerland, where Greenland is expected to be a major focus. Ahead of the speech, the president shared his threats once again for the U.S. to take over the Danish territory. How far are you willing to go to acquire Greenland? You'll find out. The president now threatening to impose new tariffs on NATO allies, including a 10 percent import tax starting in February on goods from certain European countries. In response, the financial markets taking a nosedive on Tuesday. French President Emmanuel Macron, alongside many of his European peers, are pushing back on the president's threats. We need more stability in this world, but we do prefer respect to bullies. The president now downplaying tensions with Macron and other leaders. I think I get along very well with them. They always treat me well. They get a little bit rough when I'm not around, but when I'm around, they treat me very nicely. Trump claims Greenland is needed for U.S. national security. However, thousands in Denmark and Greenland were seen protesting, wearing red hats that say Make America Go Away. Nicole D'Antonio, ABC News, Washington.