GOP Rep. Michael McCaul (Texas) said Sunday that the United States’s invasion of Greenland would mean “war” with NATO. “The fact is, the president has full military access to Greenland to protect us from any threat.

TIME spoke to legal experts about whether Trump could legally pull the U.S. out of NATO and the wider implications.

Eight nations targeted by new White House tariffs have hit back at President Donald Trump, accusing the U.S. of threatening to undermine transatlantic relationships and risking a "dangerous downward spiral."

U.S. NATO ambassador Matthew Whitaker defends American focus on Greenland amid European backlash, calling Arctic security crucial for continental defense.

As Trump calls for a U.S. takeover of Greenland, NATO's future hangs in the balance. Here are 15 claims about the security alliance.

Soldiers from European NATO countries are bracing for exceptionally challenging conditions during a reconnaissance mission aimed at strengthening security around Greenland. Denmark's top Arctic commander,

President Donald Trump warned NATO that the U.S. needs Greenland for national security, saying that Russia or China would take it otherwise.

The footage circulated as U.S. President Donald Trump's administration repeatedly expressed its desire to acquire Greenland (archived, archived), an autonomous territory of Denmark, most of which lies in the Arctic Circle. As of this writing, the Trump administration had not ruled out using military force to take the Danish territory.