French President Emmanuel Macron is reportedly pushing the European Union to deploy its so-called “anti-coercion instrument” as retaliation against new U.S. tariffs targeting NATO countries.

In a social media post on Saturday, President Donald Trump said Denmark, Norway, Sweden, France, Germany, the United Kingdom, the Netherlands, and Finland will be hit with a 10% tariff starting on Feb. 1 that will rise to 25% on June 1, until a “Deal is reached for the Complete and Total purchase of Greenland.”

The announcement came after those countries sent troops to Greenland this past week, ostensibly for training purposes, at the request of Denmark.

Macron will ask the EU to activate the anti-coercion instrument, which is the bloc’s most powerful trade weapon and has never been used since it was adopted in 2023, according to the Financial Times.

“He will be in contact throughout the day with his European counterparts and will request, on France’s behalf, the activation of the anti-coercion instrument,” a French official told the FT.