Trump Announces New Tariffs on Some European Countries in Greenland Standoff

President Trump announced in a social media post on Saturday morning his latest strategy to get control of Greenland: He is slapping new tariffs on a bloc of European nations until they come to the negotiating table to sell Greenland.

Greenland is a territory of Denmark, which will be hit with a 10 percent tariff on all goods sent to the United States beginning on Feb. 1, Mr. Trump wrote in a social media post. Norway, Sweden, France, Germany, Britain, the Netherlands and Finland, fellow NATO members that have expressed solidarity with Denmark in its refusal to yield to Mr. Trump’s demands, will also be subject to the 10 percent tariff. If those nations do not relent, he added, the rate will increase to 25 percent on June 1, “until such time as a Deal is reached for the Complete and Total purchase of Greenland.”

The leaders of Europe reacted Saturday with unified outrage to Mr. Trump’s latest coercions on the massive island in the North Atlantic. So, too, did lawmakers in Washington, including some members of the president’s own party. And the abrupt announcement of new tariffs seemed to throw a trade deal Mr. Trump had struck with the European Union into serious doubt.

In his post, Mr. Trump argued that the United States needed to control Greenland as a bulwark against Chinese and Russian ambitions in the Arctic, although the United States already has the right to expand its military presence in Greenland under a 1951 agreement with Denmark.

The president’s new threat comes as the Supreme Court weighs overturning the legal authority that the president would probably use to impose these tariffs. The court is set to rule in the coming weeks on Mr. Trump’s use of an emergency law, the International Emergency Economic Powers Act, which the president has used to threaten tariffs at a whim against numerous countries over the past year.

If the court rules against Mr. Trump, he may not be able to impose tariffs like this.

The United States currently charges a 10 percent tariff on British imports and a 15 percent tariff on imports from the European Union, after striking limited trade deals with both governments last year. The new tariffs would presumably be imposed on top of that, and it remains to be seen how other trading partners would respond. Tariffs are paid by importers, not by the products’ country of origin, with the costs often passed on to American consumers.