Tesla warned of the hit to its bottom line from tariffs, while SpaceX complained how foreign trade barriers affect its Starlink internet satellite service.

Mr. Musk is fundamentally a creature of Silicon Valley, a scene that initiated an entire revolution in power dressing. The young masters of that universe dressed down to show that they were members of a new elite — one that refused to dress like the grown-ups they were about to topple. It was the defeat of the suit by the T-shirt.

Elon Musk, who is leading the Trump administration's effort to cut and streamline the federal government's workforce, visited the National Security Agency on Wednesday to meet with the NSA's head, a spokesperson for the agency told Reuters.

Elon Musk visited the National Security Agency on Wednesday, current and former U.S. officials said, meeting with leadership a week after saying the intelligence and cybersecurity outfit needed an overhaul.

Elon Musk met with the leader of the National Security Agency and U.S. Cyber Command this week, suggesting America's spy agencies won't escape the billionaire's efforts to reshape the federal governme