Elon Musk still holds claim to being the world’s richest man, but his most successful company is facing challenges as the businessman devotes his attention to President Donald Trump’s Department of Government Efficiency.

The time and focus Musk has dedicated to slashing federal jobs has sent investors and customers bolting from Tesla stock and cars, adding to other business for the divisive CEO.

This suggests that the reaction of consumers to Mr Musk’s antics are only one reason for falling sales. An updated Model Y, Tesla’s best-selling vehicle, has just gone on sale. In preparation Tesla ran down inventory of the old model, crimping supply. Customers have doubtless held off purchases until the new car is available.