By David Lawder WASHINGTON (Reuters) – U.S. Trade Representative Katherine Tai on Friday said the Biden administration has not “sworn off” efforts to liberalize trade and open markets, but such policies can no longer weaken supply chains and harm U.S. workers and the environment. Tai, speaking at a Roosevelt Institute conference on industrial policy, said that government efforts to rebuild U.S. industries must complement trade policies and rejected criticism of the Biden administration’s lack of appetite for traditional free-trade deals. “We have not sworn off market opening, liberalization an…