US lawmakers have sent a second request to former Nvidia CEO Jensen Huang and the company's leadership, seeking answers over alleged links to a Chinese intelligence asset. Three House committee chairmen have also requested appearances from Nvidia General Counsel Tim Teter and Commerce Under Secretary Jeffrey Kessler. The lawmakers cited national security concerns surrounding Nvidia, Huang and Singapore-based company Megaspeed. They say Congress needs to establish whether US national security was put at risk and have called for stronger AI chip security legislation.