Experts say he could easily snuff out federal investigations or safety initiatives that have stymied Tesla or his other companies.

Musk, who also runs SpaceX and a number of other companies, has been known to make big often exaggerated promises. For example, he once called the Hyperloop, which was never built, the "fifth mode of transport" and famously promised to take Tesla private in a Twitter post, saying he had secured financing that he didn't have.

Elon Musk, the CEO of EV maker Tesla (TSLA), is pushing for more transparency and accountability in the U.S. government and has now set his

Who can stop Elon Musk? Even though it’s illegal for him to seize control of federal agency finances to slash the workforce, a Republican Congress is unlikely to assert its legally mandated prerogatives.