WASHINGTON (REUTERS) - US President Joe Biden's nominee to a post overseeing export policy on China said on Tuesday (Sept 21) he sees Chinese telecoms firm Huawei as a national security threat and expects to keep the company on a trade blacklist unless "things change." If confirmed as Under Secretary of Commerce for Industry and Security, former Pentagon official Alan Estevez also pledged to "look at" Honor Device - a handset unit spun off of Huawei - to see whether the telecommunications company was using the spinoff brand to minimise or circumvent its own blacklist designation. "I've seen previous maneuvers...