By blocking a Japanese company’s takeover of U.S. Steel, President Joe Biden said he was protecting good jobs in the American heartland. He may be putting them at risk instead. In making its nearly $15 billion bid for the storied Pittsburgh-based steelmaker,

President Joe Biden announced he was blocking the purchase of U.S. Steel by Japanese steelmaker Nippon Steel on dubious economic and national security grounds.

The president says the acquisition could threaten national security. Both steel companies say they will fight the decision.