Jensen Huang to face Congress under oath, days after quitting Nvidia

Mast, a Florida Republican, told reporters he had already warned Huang that a subpoena would follow if he balked at appearing voluntarily. The exact date is still being haggled over, but the session is expected to run before Thanksgiving. It will likely span several committees and be held under oath with a transcript, according to CNBC. Mast added that Congress may bring other people involved in the matter before the public later.

The questioning is set to zero in on Huang's relationship with Alice Huang, whom US officials reportedly believe passed information to China. Lawmakers also want to know whether Nvidia chips reached China through Megaspeed in breach of export controls. Both threads sit at the center of the committee's interest in the case.

The timing is brutal. The testimony was announced hours after Huang resigned as Nvidia's chief executive, president and board member, effective immediately. He now heads to Capitol Hill as a private citizen rather than the head of the chip giant.