Trump declares emergency over IT threats He signed an executive order which effectively bars US companies from using foreign telecoms believed to pose national security risks. The move was instantly welcomed by Federal Communications Commission Chairman Ajit Pai, who called it "a significant step toward securing America's networks". The US had already restricted federal agencies from using Huawei products and has encouraged allies to shun them, while Australia and New Zealand have both blocked the use of Huawei gear in 5G networks. But what may hurt Huawei more is the US decision to put them on the "entity list" - effectively banning American suppliers from selling to the firm. Huawei may not need the US market, but it certainly needs the key components that it gets from the US.