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

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.

President Donald Trump on Tuesday threatened to cut off the billions of dollars in subsidies that Elon Musk’s companies receive from the federal