By David Shepardson (Reuters) – U.S. President Joe Biden on Sunday named the members of an emergency board tasked with helping resolve disputes between freight rail carriers and their unions, the White House said. Biden signed an order on Friday ahead of a deadline to intervene in nationwide U.S. railroad labor talks covering 115,000 workers or open the door to a potential strike or lockout that could threaten an already fragile economy and choke supplies of food and fuel. Biden named Ira F. Jaffe https://www.law.gwu.edu/ira-f-jaffe to chair the presidential emergency board. Jaffe, who has bee…