A senior U.S. official told the Commerce Department’s enforcement staff this week that China’s Huawei should still be treated as blacklisted, days after U.S. President Donald Trump sowed confusion with a vow to ease a ban on sales to the firm. Trump surprised markets on Saturday by promising Chinese President Xi Jinping on the sidelines of the G20 summit in Japan that he would allow U.S. companies to sell products to Huawei Technologies Co Ltd.