Tesla investors are cheering the CEO's re-engagement with the company.

But Musk was a creature of Silicon Valley, a scion of the “PayPal mafia” whose leadership and willingness to take big risks propelled him to unparalleled wealth and influence.

Musk described it as a “massive spending bill” that increases the federal deficit and “undermines the work” of his Department of Government Efficiency, known as DOGE.