Sen. Bernie Sanders (I-Vt.) on Tuesday said Greenland stands a chance of remaining an autonomous territory within the kingdom of Denmark despite ongoing threats of a forcible takeover from President Donald Trump — but only if congressional Republicans take action.

“I’m not a great fan of my Republican colleagues, but I think that for a variety of reasons, including self-preservation, I think there are about 8% of the American people [who] think invading Greenland is a good idea,” Sanders told “Late Show” host Stephen Colbert.

He continued, “So you don’t want to campaign on that, and I think some of my Republican colleagues are understanding that this is just very, very crazy and not something that can be supported.”

Colbert agreed with Sanders that invading a fellow member of the North Atlantic Treaty Organization is “crazy,” arguing the threat alone “sounds like the death of NATO,” but challenged his premise that Republicans would prioritize this over their fealty to Trump.

Sanders appeared to have no solution other than chronicling NATO’s historic benefits.

“I think understanding that we have had an alliance with European countries for well over 100 years, that we saved the world from Nazism and fascism because of the United States and the U.K. and France and European countries, I think that’s a deep alliance,” he said.

The White House recently confirmed that U.S. military force is “always an option” should Denmark decline to sell Greenland, and when asked Tuesday during a news conference how far he might go if that continues to be the case, Trump told reporters: “You’ll find out.”

Sanders on Tuesday likened Trump to a “narcissistic, 4-year-old spoiled brat.”

Mark Schiefelbein/Associated Press

The honor went to Venezuelan opposition leader María Corina Machado, who notably handed it to Trump after he publicly hinted it “would be a great honor” for him — behavior which Sanders said Tuesday was that of a “narcissistic, 4-year-old spoiled brat.”

“In the midst of all the craziness, the idea that you would have the president of the United States say, ‘Norway, you didn’t give me the Nobel Prize, I have to invade Greenland, you hurt my feelings,’” Sanders mockingly added. “I mean … it’s pathetic.”

Colbert later returned to his central question about tangible steps to keep Trump out of Greenland, but when Sanders cited “a variety of ways” such as the War Powers Resolution Act, Colbert countered that this didn’t do a thing to stop Trump from bombing Venezuela.