Rep. Brian Mast, chairman of the House Foreign Affairs Committee, is warning that if Nvidia CEO Jensen Huang gave information to someone who turned out to be a Chinese spy, it would have put U.S. national security at risk. His remarks follow New York Times reporting that U.S. intelligence found Alice Huang, a Chinese citizen and former Megaspeed executive with no relation to Jensen Huang, had been funneling information to Beijing and had developed a close relationship with him. Her company reportedly bought billions of dollars' worth of Nvidia chips, and officials suspect some of them may have been smuggled into China despite U.S. export controls. Mast told ABC News he is deeply worried about the national security implications because Huang leads the company at the center of the AI chip race.

Mast, along with Reps. John Moolenaar and Rick Crawford, has asked Huang for a closed-door briefing on his dealings with Alice Huang and on Nvidia's safeguards against foreign espionage. Mast said he is prepared to issue a subpoena if Huang did not respond by Wednesday. Huang has acknowledged an affair, and Nvidia's board has opened an investigation, while the company has said his interactions with her were no different from his meetings with other executive clients. President Donald Trump said Huang told him he didn't know she was involved with an alleged Chinese spy, and officials reportedly did not initially believe Huang knew. Nothing made public so far shows what, if anything, Huang actually shared, which is why Mast's warning is framed as an "if" and why Wednesday's deadline matters.