Flanked by cranes and shipyard workers, President Joe Biden made the pitch Thursday that unions will be building America's renewable energy future — a courtship of organized labor at a moment when some major unions are weighing strikes that could disrupt the growth he wants to campaign on in 2024."I'm here today to talk about what we're doing to invest in America, invest in Pennsylvania, invest in our clean energy future, " Biden told an audience that included hard-hatted workers.The president toured the Philly Shipyard, where there was a steel-cutting ceremony for the Acadia, a vessel that will help to build offshore wind farms.