Tesla remains Musk’s best-known business, but its fortunes are less directly tied to the government than SpaceX, his rocket-building company.

The billionaire SpaceX, Tesla and X owner who catapulted his zealous embrace of President Donald Trump into a powerful position slashing government spending now risks sweeping cuts to his own bottom line after resuming the feud that led to their very public bitter split last month.

Tesla investors ought to be at least a little concerned that things may get worse. The shares plunged 14% on June 5 when the Musk and Trump relationship spectacularly fell apart in an escalating war of words on social media.