Early signs emerged today of how quickly President-elect Donald Trump's second administration would shift the government's legal positions on a wide range of issues facing the Supreme Court, as speculation swirled about whom Trump would tap for critical positions in the government. Legal experts said they expected the Justice Department under Trump to rapidly reverse its position on a transgender rights case pending before the court. People who follow the court are also bracing for a flip in the positions taken under President Biden on environmental issues, gun rights, criminal sentencing and employment discrimination. Trump's transition team for climate and the environment is considering relocating the E.P.A. out of Washington and other drastic changes.