US President Joe Biden ’s nominee to a post overseeing export policy on China said on Tuesday he sees Chinese telecoms firm Huawei Technologies Co 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 Co – a handset unit spun off of Huawei – to see whether the telecommunications company was using the spin-off brand to minimise or circumvent its own blacklist designation. “I’ve seen previous manoeuvres by…