https://www.reuters.com/article/us-usa-huawei-tech-exclusive/exclusive-u-s-weighs-new-regulations-to-further-restrict-huawei-suppliers-sources-idUSKBN1Y320P >The U.S. government may expand its power to stop more foreign shipments of products with U.S. technology to China's Huawei, amid frustration the company's blacklisting has failed to cut off supplies to the world's largest telecoms equipment maker, two sources said.