The homeland security secretary blamed a telecommunication outage, but said that officials did not know the cause and that a fix would “take some time.”
Mr. Huang championed start-ups, with Nvidia holding $48 billion worth of stakes in 229 private companies, including OpenAI and Anthropic, at the end of July.
The administration appears to be moving toward a long-term economic pressure campaign as President Trump expresses little urgency in securing a nuclear agreement.
The former president’s new memoir trumpets his achievements while justifying his decision to run for a second term and his embrace of Israel’s war in Gaza.
A prolonged outage left many without email and other services, the most recent reminder that the world’s technological underpinnings rely on just a few companies.
Search and rescue operations were continuing after the riverboat, which had nearly 200 people aboard, was struck by a tanker ship, the authorities said.