The U.S. Supreme Court could throw a wrench into Trump’s plan to take Greenland as soon as Tuesday

The U.S. Supreme Court could rule on Tuesday that President Donald Trump’s trade tariffs are illegal—and that would throw up a significant hurdle for his plan to acquire Greenland.

President Trump posted his latest threat to take over Greenland late last night on Truth Social: “Now it is time, and it will be done!!!”

Previously, on Saturday, he threatened to impose tariffs of 10%, on Denmark, Norway, Sweden, France, Germany, the U.K., the Netherlands, and Finland, rising to 25% on June 1, “until such time as a Deal is reached for the Complete and Total purchase of Greenland.”

But analysts noted this morning that the court is due to issue rulings on Tuesday of this week. The expectation on Wall Street is that the court will rule that the president does not have the power under the International Emergency Economic Powers Act (IEEPA) to impose tariffs on routine international trade. If that happens, Trump’s threats could become meaningless, at least in the short-term.

“Threatened U.S. tariffs … may be overturned by the U.S. Supreme Court,” UBS advised clients in a note this morning.

At ING, Carsten Brzeski and Bert Colijn said, “If the Supreme Court rules against all earlier IEEP...