https://www.washingtonpost.com/news/the-switch/wp/2018/03/12/trump-blocks-broadcoms-117-billion-bid-for-qualcomm-out-of-national-security-concerns-a-highly-unusual-move/

Experts say the government's investigation into the hostile takeover has been unusual in its speed and intensity, a sign that the United States is growing increasingly concerned about putting mobile technology into the hands of an Asian company.