Vice President Kamala Harris and President Joe Biden were in Pennsylvania on Labor Day as they planned to voice opposition to the sale of U.S. Steel to Nippon Steel in Tokyo. In December, Nippon Steel agreed to acquire U.S. Steel for $14.9 billion, according to The New York Times. However, backlash has prevented the merger from completing, with both Republicans and Democrats decrying the sale of a 123-year-old industrial firm to a foreign company. On Monday, Harris and Biden were expected to express opposition to the deal. Want more breaking political news? Click for the latest headlines at Ra…