FILE PHOTO: The Huawei logo is pictured in central Warsaw, Poland, June 17, 2019. Picture taken June 17, 2019. REUTERS/Kacper Pempel

WASHINGTON: A senior US official this week told the Commerce Department's enforcement staff that China's Huawei should still be treated as blacklisted, days after US President Donald Trump sowed confusion with a vow to ease a ban on selling to the firm.