The Trump administration showed no sign of backing down from restrictive tariffs in the face of pushback from allies and China over the weekend, isolating the U.S. and complicating the president’s meeting later this week with leaders of Washington’s staunchest partners.
Top finance officials from the Group of Seven leading nations met in Canada, where the non-U.S. members issued a public rebuke of Washington’s new steel and aluminum tariffs. Those six—the host Canada, along with France, Germany, Italy, Japan and the U.K.—adopted...