New Delhi, Jan. 21 -- There is no practical military, diplomatic or strategic requirement for the United States to take Greenland and there are downsides for its alliance and for America itself, former US Army Officer and Foreign Policy Expert Daniel L Davis has said.

In an interview with ANI, Daniel Davis said that there is no justification for US President Donald Trump's claims over Greenland.

Answering a query over Trump's plans to take Greenland, which has irked European allies of the United States, Daniel Davis said it is a "really challenging question, a big problem, a problem that doesn't need to exist".

"It is very unclear what is driving President Trump. I mean, we just have to, first of all, just look at what's being claimed ...