Washington  — President Donald Trump on Wednesday signed an executive order declaring a national emergency and barring US companies from using telecommunications equipment made by firms posing a national security risk, paving the way for a ban on doing business with China's Huawei Technologies. The executive order invokes the International Emergency Economic Powers Act, which gives the president the authority to regulate commerce in response to a national emergency that threatens the US. The order directs the commerce department, working with other government agencies, to draw up a plan for enforcement within 150 days. The order, which has been under review for more than a year, is aimed at protecting the supply chain from "foreign adversaries to the nation's information and communications technology and services supply chain", said commerce secretary Wilbur Ross. "Under President Trump's leadership, Americans will be able to trust that our data and infrastructure are secure," he sa...

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