President-elect Donald Trump's opposition to the U.S. Steel deal with Nippon Steel undermines his claims to helping the working-class voters who elected him.

Nippon Steel had promised to invest $2.7 billion in U.S. Steel’s aging blast furnace operations in Gary, Indiana, and Pennsylvania’s Mon ... Cliffs from acquiring U.S. Steel and to damage the Pittsburgh manufacturer’s ability to compete.

But that isn’t possible if we want U.S. Steel to remain in Pittsburgh; Gary, Indiana; and Birmingham, Alabama, and for steelworkers to keep their jobs. There is no better alternative.