Mr. Musk, one of President Trump’s main advisers, has not outlined a plan to reverse falling sales at the electric car company of which he is chief executive.

The EV firm’s sales are down in many parts of Europe, while rivals are chipping away at its market share in the company’s native US

Elon Musk’s move-fast-and-break-things ethos has served him well so far in his efforts to demolish the federal bureaucracy. But now comes the moment the billionaire leading President Donald Trump’s DOGE initiative may not be prepared for — managing the politics of his sprawling cuts.