U.S. President Donald Trump said Monday that the FBI is investigating circumstances surrounding Nvidia chief executive Jensen Huang’s relationship with an alleged Chinese government agent, while expressing confidence that Huang would be “in good shape.”

Speaking at a White House briefing, Trump said he had spoken with Huang earlier in the day, according to CBC reporting carrying Associated Press and Reuters credits.

“He said he had absolutely no idea that the person in question was a spy,” Trump said. The allegation of espionage remains disputed by China.

Nvidia announced Sunday that it was conducting an independent investigation into reports that Huang had been the “target of a foreign intelligence effort.” Huang acknowledged an intimate relationship with a business executive in an open letter, apologizing to his wife and the company. He did not identify the woman.

“I support the investigation and will cooperate fully,” Huang wrote.

The New York Times reported that the woman was a Chinese citizen and former executive of Singapore-based data centre company Megaspeed International. According to CBC’s account of that reporting, U.S. intelligence had determined she was gathering information for Beijing.

China denied Monday that it had tried to ensnare Huang, calling the allegations unsubstantiated and a smear campaign.

Democratic House Leader Hakeem Jeffries said Congress needed more information and that there were “real concerns that need to be addressed.” He said a classified briefing for congressional leaders Monday briefly covered Nvidia.

A central unresolved question is whether confidential information was compromised. The supplied reporting does not establish that Nvidia’s sensitive information or chip technology reached Chinese authorities through the relationship.

Sources