M&A and regulatory lawyers are still talking about the “brilliant” and unprecedented use of a review by the Committee on Foreign Investment in the United States to knock out Broadcom Ltd.’s attempted hostile takeover of U.S.-based semiconductor maker Qualcomm Inc. in March. 

They’re saying it could be a trendsetter in its novel use of the CFIUS review as a takeover defense. But the president’s action also speaks to the Trump administration’s new priorities in the growing economic competition with China over technological innovation and infrastructure.