Trump, in his executive order, said there is "credible evidence" that leads him to believe that if Broadcom Limited took control of the US-based Qualcomm it "might take action that threatens to impair the national security of the US".
As such, Broadcom and Qualcomm "shall immediately and permanently abandon the proposed takeover", ordered the US President.
"The proposed takeover of Qualcomm by the Purchaser is prohibited, and any substantially equivalent merger, acquisition, or takeover, whether effected directly or indirectly, is also prohibited," Trump said in the executive order issued today.
In such a scenario, Broadcom -- which currently works under the laws of Singapore -- would have been considered as an American company and thus its proposed USD 117 billion would have been considered outside the preview of a federal agency -- Committee on Foreign Investment in the United States (CFIUS) that reviews foreign deal.
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In a letter, the CFIUS had confirmed the national security concerns. Last week, the CFIUS issued an interim order to Qualcomm directing it to postpone its annual stockholders meeting and election of directors by 30 days.
"This decision is based on the facts and national security sensitivities related to this particular transaction only and is not intended to make any other statement about Broadcom or its employees, including its thousands of hardworking and highly skilled US employees," Mnuchin said.
"The CFIUS process focuses exclusively on identifying and addressing national security concerns. This focused mandate reinforces our commitment to welcoming foreign investment, while at the same time reinforcing our commitment to protecting national security," he added.
Last week, several US lawmakers had called for stopping Broadcom's takeover of Qualcomm.
Congressman Duncan Hunter said that the merger would "damage American security" and had pointed at Broadcom's "increasing" ties with China to highlight his reservation about the deal.
"This should concern us as a nation. These ties were most recently reflected in the agreements Broadcom signed with HBC, Inspur and StarTimes.China has a finely honed capability to access the technology of companies such as Broadcom, along with that of their subsidiaries and acquisitions," he said.
"Such a company, if subjected to national or terrorist interests adverse to America, could install lockout features to block our security agencies from monitoring mobile data. The possibilities for damaging US security are limitless," the lawmaker said.
Senator Tom Cotton said that Qualcomm's work is too important to the US' national security to let it fall into the hands of a foreign company-and in a hostile takeover no less.
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