Elon Musk has spent decades building a universe of companies that has served as an incubator for up-and-coming engineers and a proving ground for his inner circle. That universe — an ecosystem of Silicon Valley tech titans,

Americans across the country are deeply split over Mr. Musk, with some welcoming his cuts to government and others outraged at what they saw as an abuse of power.

Twenty-one federal tech employees resigned instead of helping DOGE, saying they will not use their skills to "dismantle critical public services."