Vice President Kamala Harris and former President Donald Trump both made their cases on Labor Day to support unions and American jobs.In Pennsylvania, Harris appeared alongside President Joe Biden and union workers, voicing opposition to U.S. Steel being sold to a Japanese company. Both agreed the deal would hurt American workers and made clear a policy position for Harris’ election campaign.”We are fighting to build an economy that works for all working people. That has always been the vision of the labor movement and that is the vision of our campaign,” Harris said.Trump, who also opposes the steel deal, was not on the campaign trail but made claims on social media instead, saying the weak and failed leadership of the current administration has led to high costs. As president, he said he would continue building on fair and free trade deals and programs to help the American worker. “When I …