The Trump administration is considering changing US regulations to allow it to block shipments of chips to Huawei Technologies from companies such as Taiwan’s TSMC, the world’s largest contract chipmaker, two sources familiar with the matter said. New restrictions on commerce with China’s Huawei are among several options to be considered at high-level US meetings this week and next. The chip proposal has been drafted but its approval is far from certain, one of the sources said. The measure would be a blow to the world’s no. 2 smartphone maker as well as to TSMC, a major producer of chips for Huawei’s HiSilicon unit and mobile phone rivals Apple Inc and Qualcomm Inc. “What they’re trying to do is make...