Huawei argues that the provision in the NDAA in which it is explicitly named is really a "bill of attainder" — wherein a legislative act pronounces a specific individual or group guilty of some offense and punishes them without due process. That's forbidden by the U.S. Constitution. The company's lawyers also argued that Section 889 is unlawful because it violates Huawei's right to due process, meaning the firm cannot hear the evidence against it and fight that in court.

www.cnbc.com/2019/03...pment.html