https://www.cnet.com/news/why-trump-blocked-qualcomm-broadcom-its-all-about-5g/

Donald Trump just stepped into the global 5G "arms race."

The US president late Monday issued an executive order blocking a corporate merger, Broadcom's proposed $117 billion deal to buy mobile chip giant Qualcomm, citing national security concerns. The order came a week after the Committee on Foreign Investment in the US, or CFIUS, expressed concern that the takeover of Qualcomm by Singapore-based Broadcom could leave the US behind when it comes to mobile technology.