PITTSBURGH — (WPXI) – With Election Day just 64 days away, Vice President Kamala Harris spent part of her Labor Day making another campaign stop in Pittsburgh – this time alongside President Joe Biden, who called Harris the best choice in November. “It was the single best decision I made as President of the United States,” Biden said. Standing in front of a crowd of union members and supporters at the International Brotherhood of Electrical Workers (IBEW) union hall in the South Side, Harris made it clear — if elected, she would block the possible sale of U.S. Steel to Japan’s Nippon Steel. “U.S. Steel should remain American-owned and American-operated, and I will always have the backs of America’s steelworkers,” Harris said. International President of United Steelworkers David McCall applauded Harris in a statement Monday, saying the vice president has joined union members on the picket line before. U.S. Steel, however, said the deal with Japan would be best for its employees, shareholders, communities, and customers. Just last week, Nippon Steel announced plans to invest $1 billion in Mon Valley Works if the U. S. Steel merger gets approved. The White House announced late Monday night that Vice President Harris will be back in Pittsburgh this Thursday. No other details have been released.