https://www.techradar.com/news/trump-blocks-qualcomm-takeover-attempt

The US government has blocked Broadcom’s proposed $140 billion takeover of rival Qualcomm on national security grounds.

Issuing a Presidential Order to halt the deal, President Donald Trump said there was credible evidence that the controversial acquisition, which would be the largest in the history of the technology sector, would impact the country’s national security.