Lawyers for Huawei are disputing claims by the U.S. government to argue that a ban on its products under the Fiscal Year 2019 National Defense Authorization Act violates the Constitution, in a case that sets up a legal showdown over issues with broader implications for addressing cybersecurity threats from China. The dispute centers on Section 889 of the FY-19 NDAA, which Huawei says violates the Constitution's prohibition of a "bill of attainder," or a legislative declaration of guilt by a...