A Chinese businesswoman who had a close relationship with Jensen Huang was found to be passing intelligence to Beijing. President Trump was briefed and took no action.
Jensen Huang, the chief executive of Nvidia, is influential at the White House on technology policy and has developed a close relationship with President Trump.
In court testimony, the agent outlined the willingness of Kash Patel, the F.B.I. director, to take orders from President Trump to investigate his perceived enemies.
The U.S. government has ordered diplomats and other federal employees to leave Saudi Arabia. It is also drawing down staff at other missions in the region.