Huawei is taking a two-pronged approach to defending itself against the USA’s decision to place it on an ‘entity list’, which bars US firms from trading with it unless they have a special license. Against the backdrop of escalating trade wars between the US and China, and cybersecurity allegations (which Huawei denies), the Chinese firm has filed suit against the Trump administration, while stepping up its attempts to woo public opinion round the world. The firm’s chief legal officer, Song Liuping, wrote a high profile article in the Wall Street Journal last weekend which argued that the government ban is based on a new law which is unconstitutional. The 2019 National Defense Authorization Act – which allows the defense secretary…