With President Trump vowing to get tougher on trade, troubled American makers of everything from steel tubing and aluminum foil to washing machines have lined up to ask Washington for protection from foreign rivals. But Mr. Trump’s first big international trade fight could be over solar panels. Major manufacturers in the United States and China, as well as a slew of other businesses that buy and use solar panels, are readying for a clash that could begin as soon as January. The solar panel dispute comes at a time when senior administration officials have been signaling their intention to take a much tougher trade stance toward China, where most solar panels are made.
