Republican House Speaker Mike Johnson called China an “adversary” of the U.S. on Wednesday after a report that the country has told tech companies to stop buying Nvidia‘s artificial intelligence chips.

The Cyberspace Administration of China ordered companies to halt purchases of Nvidia’s RTX Pro 6000D, a chip that was made for the country, the FT reported, citing people familiar with the matter.

“We can only be in service of a market if a country wants us to be,” Nvidia CEO Jensen Huang said at a press conference in response to the ban on the company’s chips. “I’m disappointed with what I see but they have larger agendas to work out between China and the United States.”

Last month, the White House reached a deal with Nvidia and competitor Advanced Micro Devices to obtain the export licenses to restart certain chip sales to China. As part of the deal, both companies agreed to pay 15% of the sales to the U.S. government.

Earlier this year, the Trump administration told Nvidia that it would require a license to sell its China-designed H20 processors in the world’s second-largest economy. The company previously created the chip to circumvent prior restrictions on AI chip exports instituted under the Biden administration due to national security concerns.

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