https://www.cnbc.com/2018/03/06/broadcom-qualcomm-deal-in-jeopardy-after-cfius-letter.html

Broadcom's attempt to buy Qualcomm is in jeopardy after the U.S. Treasury's Committee on Foreign Investment in the United States outlined concerns it had about the transaction in a March 5 letter addressed to two of Broadcom's lawyers.

CFIUS listed several issues, including Broadcom's reputation for cutting research spending, a concern Microsoft and Google shared, and potential national security risks that could arise from exploiting or compromising Qualcomm's assets through arrangements with "third party foreign entities," according to the letter.