Tesla sales plummeted in several major markets in Europe last month, including Germany, the UK, and France. Is Elon Musk to blame?

Musk, who also runs SpaceX and a number of other companies, has been known to make big often exaggerated promises. For example, he once called the Hyperloop, which was never built, the "fifth mode of transport" and famously promised to take Tesla private in a Twitter post, saying he had secured financing that he didn't have.