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...