Donald Trump’s willingness to attack adversaries while rattling allies is threatening to push the world into a new nuclear age.
From the North Atlantic to the West Pacific, governments are debating more publicly than before whether they, too, must get the bomb. Germany and Poland, who have long been satisfied to sit under the US nuclear umbrella, have in the wake of Trump’s musings about taking Greenland welcomed French overtures about extending the country’s own strategic deterrent across the continent.