By Jeff Mason and Alexandra Alper WEST MIFFLIN, Pennsylvania (Reuters) -U.S. President Donald Trump heads to the Pittsburgh, Pennsylvania, area on Friday to headline a rally to celebrate Nippon Steel's "planned partnership" with U.

President Donald Trump is holding a rally in Pennsylvania on Friday to celebrate a details-to-come deal for Japan-based Nippon Steel to invest in U.S. Steel, which he says will keep the iconic American steelmaker under U.

President Donald Trump is visiting a steel plant outside of Pittsburgh on Friday, where he is expected to tout a previously-announced deal between Japan's Nippon Steel Corporation and the United States Steel Corporation.