The standoff over Greenland is heating up.

And the U.S. president is back with a new warning.

Despite a poll last year showing 85% of Greenlanders don’t want to become part of the U.S., the president appears set on taking control of the Arctic territory — and he just delivered a chilling new warning.

In a Truth Social post on Monday morning, the president slammed Denmark for allegedly failing to neutralize what he calls the “Russian threat” on the Arctic island, declaring:

”Unfortunately, Denmark has been unable to do anything about it. Now it is time, and it will be done!!!”

Trump claimed NATO has been urging Denmark for 20 years to “get the Russian threat away from Greenland,” and he signaled that he may take matters into his own hands.

”Until Greenland becomes American”

The post comes just a day after Trump announced a 10% tariff on goods from Denmark, Norway, Sweden, France, Germany, the UK, the Netherlands and Finland, targeting nations he says are standing in the way of U.S. control of Greenland.

Starting on Feb. 1, Trump warned that the tariffs will remain in place “until Greenland becomes American.”

The move has sparked immediate backlash across Europe. Emergency talks among EU ambassadors were held Sunday, and EU Council President Antonio Costa issued a strong statement: “Tariffs would undermine transatlantic relations and are incompatible with the EU-U.S. trade agreement.”

Costa added that the EU is “ready to defend ourselves against any form of coercion,” and a special summit of EU leaders is set for Thursday to address the Greenland crisis.

Meanwhile, Denmark, Norway, Sweden, France, Germany, the U.K., the Netherlands, and Finland issued a joint statement stressing that troops sent to Greenland for Operation Arctic Endurance “pose no threat to anyone.”

Danish Foreign Minister Lars Løkke Rasmussen warned that dialogue is ongoing but insisted, “we will not give up on that… So we will stay on track — unless U.S. decides differently.” Norwegian Foreign Minister Espen Barth Eide added:

”We will not allow ourselves to be put under pressure, and those types of threats (of U.S. tariffs) are unacceptable between close allies.”

”Abolishing NATO as we know it”

According to some experts, the controversy marks one of the sharpest rebukes from Europe since Trump returned to the White House nearly a year ago.

Republican Rep. Michael McCaul blasted the idea of a U.S. military takeover of Greenland on Sunday, warning that any such action would put America in direct conflict with its NATO allies — and could even spell the end of the alliance itself.

During an appearance on This Week, McCaul — the former chair of both the House Foreign Affairs and Homeland Security committees — pushed back on President Trump’s rhetoric and threats tied to the Arctic island.

“The fact is, the president has full military access to Greenland to protect us from any threat,” McCaul said.

“So if he wants to purchase Greenland, that’s one thing. But for him to militarily invade would turn Article 5 of NATO on its very head and, in essence, press a war with NATO itself. It would end up abolishing NATO as we know it.”