The Associated Press

The eight European countries targeted by U.S. President Donald Trump for a 10% tariff for opposing American control of Greenland blasted the move Sunday, warning that his threats “undermine transatlantic relations and risk a dangerous downward spiral.”

The joint statement by some of America’s closest allies signaled a possible turning point in the recent tensions over sovereignty and security nearly 24 hours after Trump’s threat.

It was also the most forceful rebuke of Trump from the European allies since he returned to the White House.

Meanwhile in Washington, Republican lawmakers are scrambling to contain Trump’s threats of taking possession of Greenland, with some showing the most strident opposition to almost anything the Trump administration has ever done while in office.

They gave floor speeches on the importance of NATO last week. They introduced bills meant to prevent the U.S. from attacking Denmark. And several traveled to Copenhagen to meet with Danish counterparts.

But it’s not clear that will be enough almost a year ago. In recent months, Europeans have mostly opted for diplomacy and flattery around him, even when seeking an end to the war in Ukraine. Sunday’s statement, as well as some European countries sending troops to Greenland for a Danish military training exercise, appeared to be a step away from that strategy.

The unusually strong joint statement from Denmark, Norway, Sweden, France, Germany, the United Kingdom, the Netherlands and Finland said troops sent to Greenland for operation “Arctic Endurance” pose “no threat to anyone.”

Danish Foreign Minister Lars Løkke Rasmussen told reporters in Oslo that a dialogue was opened with the U.S. last week and “we will not give up on that. … So we will stay on track — unless U.S. decides differently.”

Added Norwegian Foreign Minister Espen Barth Eide at the same news conference: “We will not allow ourselves to be put under pressure, and those types of threats (of U.S. tariffs) are unacceptable between close allies,”

Six of the countries targeted are part of the 27-member European Union, which operates as a single economic zone in terms of trade.

Following emergency talks among the EU’s national envoys Sunday, EU Council President Antonio Costa said the bloc’s leaders agree “that tariffs would undermine transatlantic relations and are incompatible with the EU-U.S. trade agreement.”

They expressed “readiness to defend ourselves against any form of coercion,” Costa said in a statement. He is expected to convene a summit of the bloc’s leaders later this week.

Solidarity with Denmark and Greenland

Trump’s Saturday announcement sets up a potentially dangerous test of U.S. partnerships in Europe. He appeared to indicate that he was using the tariffs as leverage to force talks over the status of Greenland, a semiautonomous territory of NATO ally Denmark that he regards as critical to U.S. national security.

“We stand in full solidarity with the Kingdom of Denmark and the people of Greenland,” the group said. “Building on the process begun last week, we stand ready to engage in a dialogue based on the principles of sovereignty and territorial integrity that we stand firmly behind. Tariff threats undermine transatlantic relations and risk a dangerous downward spiral.”

There are immediate questions about how the White House could implement tariffs against the EU. It was unclear, too, how Trump could act under U.S. law, though he could cite emergency economic powers that are currently subject to a U.S. Supreme Court challenge.

EU foreign policy chief Kaja Kallas said China and Russia will benefit from divisions between the U.S. and Europe. She added on social media: “If Greenland’s security is at risk, we can address this inside NATO..”

Europe has been trying to keep Trump on its side to ensure U.S. support for Ukraine, including Washington sharing intelligence with Kyiv and its involvement in security guarantees if a peace agreement is reached with Russia.

Rasmus Søndergaard, a senior researcher at the Danish Institute for International Studies, called Trump’s announcement “unprecedented” because tariff threats normally stem from trade disagreements, not territorial disputes between allies.

“That’s of course why we’re seeing the response from European countries saying ‘enough is enough,'” he told The Associated Press. “I think there’s in part probably a strategic calculation, of course, from the governments in these countries that if you give in to Trump on this, what will be the next thing? And at some point you have to sort of push back.”

Søndergaard also said Trump leveled the playing field for Europe with the tariff threat. Europeans cannot compete militarily, but the EU can wield an economic weapon through reciprocal tariffs.