President Trump will sign a presidential proclamation announcing tariffs on imports of steel and aluminum at an Oval Office event with steel and aluminum company employees and union members, an administration official and sources briefed on the announcement told Inside U.S. Trade . The proclamation, set to be signed at 3:30 p.m., will set up a global tariff of 25 percent on steel and 10 percent on aluminum, though sources said it would include caveats outlining how companies and...