WASHINGTON, May 23 (Reuters) - U.S. President Donald

Trump on Friday announced that U.S. Steel and Japan's

Nippon Steel ( NISTF ) had agreed to form a "planned partnership"

that meant the steel company would remain in the country,

headquartered in Pittsburgh.

"This will be a planned partnership between United States

Steel ( X ) and Nippon Steel ( NISTF ), which will create at least 70,000 jobs,

and add $14 Billion Dollars to the U.S. Economy," Trump said in

a post on Truth Social.

Trump said the bulk of that investment would occur in the

next 14 months.

He added he would hold a rally at U.S. Steel in Pittsburgh

next Friday.