Broadcom’s controversial $117bn bid to acquire Qualcomm is hanging by a thread after US authorities ordered a postponement of a critical shareholder meeting. Qualcomm investors were to have made a crucial vote today (March 6), after weeks of rancorous disputes between the two chip giants. They were to have voted on Broadcom’s nominations for six replacement Qualcomm board members – if successful, the predator would have gained a potential majority on the 11-person board, paving the way for acceptance of its bid. But that meeting will now be delayed by at least a month, at the order of the powerful Committee on Foreign Investment in the US (CFIUS), which initiated an investigation in to the proposed deal. With the San…