PARIS, Jan 21 - France has asked for a NATO exercise in Greenland and is ready to contribute to it, French President Emmanuel Macron's office said on Wednesday.

News of the request comes as U.S. President Donald Trump barrels into Davos, Switzerland, on Wednesday, where he is likely to use the World Economic Forum to escalate his push for acquiring Greenland despite European protests in the biggest fraying of transatlantic ties in decades.