President Trump says he wants to make a deal for minerals from Ukraine in exchange for aid. That followed a long effort by Ukrainian officials to appeal to Mr. Trump’s transactional nature.

Duties of 25 percent on steel and aluminum will flow through to car buyers, beer drinkers, home builders, oil drillers and other users of metal goods.

Prime Minister Justin Trudeau, in a talk with business leaders, said Canada’s wealth of critical minerals are behind Mr. Trump’s comments about making its northern neighbor a U.S. state.

Control of Korea Zinc, the world’s largest producer of zinc, is at stake in a battle challenging the country’s entrenched chaebol system of powerful conglomerates.