WASHINGTON — U.S. President Donald Trump's close relationship with embattled Nvidia CEO Jensen Huang came under renewed scrutiny on Monday, after the company said its board was investigating whether the tech executive has been the target of a foreign intelligence effort. Huang is one of Trump's closest allies in Silicon Valley, and the relationship between the two dates to at least 2025. Over the past two years, he has repeatedly voiced support for the administration's agenda and become a regular presence in Washington as Nvidia sought to sell advanced chips to the Chinese market. Advanced chips are the backbone of the U.S. AI boom and government officials have previously tried to restrict China's access to them through export controls to stifle its AI capabilities. Nvidia's board launched its probe after a New York Times report said Huang had a close relationship with a Chinese businesswoman whom U.S. intelligence officials believe passed information to the Chinese government. Nvidia shares hit a seven-month low on Monday. Huang has a direct line to the president. A Reuters reporter s