The companies said they had entered into an agreement with the U.S. government to alleviate any national security concerns.

President Donald Trump would have unique influence over the operations of U.S. Steel under the terms of the investment being made by Nippon Steel.

For Japan and many other countries, the vulnerability that comes with relying on U.S. markets has become startlingly clear. First came tariffs on Canada, China, and Mexico. Then, in February, the administration introduced a 25 percent tariff on steel and aluminum (this week,

WASHINGTON -- The U.S. will have "a golden share" in U.S. Steel following its acquisition by Japan's Nippon Steel, said President Donald Trump on Thursday, signaling that Washington will have control over management.