3 big hurdles undermine Trump’s plan to extract Greenland’s mineral wealth—and America’s fraying relationship with Europe is one of them

Last week, President Donald Trump announced that he had established a framework surrounding a deal over Greenland’s future, one that guarantees the U.S. will be “involved” in the island’s mineral rights. But despite easing tensions with NATO countries after months of increasingly hostile rhetoric over ownership of the Denmark-administered territory, Trump’s shrinking pool of friends in Europe could foil his plan to extract the valuable minerals hidden under the ice.

That’s one of three...