Nvidia scandal fuels US push on China chip curbs

Allegations that Nvidia CEO Jensen Huang had an improper relationship with a woman suspected of ties to Chinese intelligence have given new momentum to efforts in the United States to tighten controls on exports of advanced artificial intelligence chips to China. Lawmakers from both parties are now pushing to attach new AI chip export limits to the fiscal 2027 National Defense Authorization Act, which sets annual U.S. defense policy and spending priorities. As the scrutiny intensified, Nvidia’s share price fell about 4%, erasing roughly $192 billion in market capitalisation.

Democratic Senator Elizabeth Warren and Republican Senator Jim Banks said in a joint statement that the reported relationship had heightened national security concerns. They argued that stronger measures are needed to close off avenues for China to obtain U.S. advanced semiconductors. Their calls build on previous requests to the Commerce Department earlier in the year to halt or review Nvidia’s export licenses for China and to conduct a full national security review.

Three bills are at the centre of the current debate. The AI Overwatch Act would expand congressional oversight over licenses for exports of advanced AI chips to China and other countries of concern, allowing Congress to review decisions on sensitive sales. The Chip Security Act would require companies to track their AI chips abroad, including location tracking, to combat semiconductor smuggling.

The third measure, the MATCH Act, would encourage U.S. allies to restrict exports of chipmaking equipment to China. All three measures previously cleared the House Foreign Affairs Committee and are now being weighed in the Senate as candidates to be folded into the defense bill. Together, they aim to tighten control over both high-end AI processors and the manufacturing tools needed to build them.

The outcome of the legislative push is seen as hinging on the position of the White House. The administration has not taken a formal stance on the proposed measures, and any veto would require two‑thirds majorities in both chambers to override. The political cost of siding with industry opponents of tighter restrictions is viewed as higher in light of the current allegations.

President Donald Trump has publicly defended Huang, saying at a White House press conference that Huang told him he did not know the woman in question was a Chinese spy. However, whether restrictions on exports of AI chips and related equipment to China will ultimately tighten will depend on how the administration balances national security concerns and industry competitiveness.

Nvidia is considered a leading opponent of both the AI Overwatch Act and the Chip Security Act, based on accounts from individuals who interacted directly with the company over several months. The company previously argued there was no semiconductor smuggling until indictments related to chip smuggling were brought by the U.S. Department of Justice, and it has stated that it complies with export regulations. Nvidia has declined to comment on the latest allegations.

The Information Technology Industry Council, whose members include Nvidia, has also opposed the proposed rules, warning they could weaken U.S. companies’ competitiveness and complicate export‑control policy. At the same time, Nvidia’s recent financial guidance already excludes any revenue from data center compute sales in China, and its data center guidance notes that Hopper shipments to China made up less than 1% of data center revenue in a recent quarter. Added tracking rules would increase compliance obligations.

Debate over the U.S. bills has also raised questions about broader effects on global semiconductor supply chains. If regulations tighten and Nvidia reduces AI chip production, there could be implications for suppliers of high‑bandwidth memory such as SK Hynix, though Nvidia has not built China data center compute sales into its current outlook. Expanded controls on chipmaking equipment could affect companies with manufacturing facilities in China, including challenges for expansion projects that rely on U.S.-made tools.