A trade standoff between the U.S. and much of the rest of the world was turning into a nail biter Monday, with Europe’s steel industry—and that of a handful of other close American allies—still unsure whether their exports to the U.S. would face new tariffs come midnight.
French President Emmanuel Macron and German Chancellor Angela Merkel both made personal visits to the White House last week but left without any visible assurances or concessions on trans-Atlantic trade issues. That had European officials and steel and aluminum...