Sen. John Fetterman (D-Pa.) vowed Monday to work to block the $14.9 billion sale of U.S. Steel Corp. to Japanese steelmaker Nippon Steel, which he described as an “outrageous” move. The deal was announced Monday, prompting the stock prices of U.S. Steel to jump up 25 percent. Fetterman criticized the sale, saying in a post on X, the platform formerly known as Twitter, that the move was “wrong for workers and wrong for Pennsylvania.”