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.

President Donald Trump selected a shiny red Tesla on the White House driveway as he showed support for Elon Musk's electric automaker.

President Donald Trump posed for photos next to a line of Tesla vehicles in front of the White House Tuesday after saying earlier on social media he would buy one as a "show of confidence and support for Elon Musk."