Demand for the U.S. auto maker’s vehicles slid amid stronger competition from Europe and China and rising anger at Elon Musk’s political forays.

Tesla Inc. sales kept sliding across Europe’s biggest electric-car markets in April, despite the company rolling out an updated version of its most popular vehicle.

Tesla's new car sales in Britain and Germany plummeted to their lowest in over two years in April, falling 62% and 46% year-on-year respectively, even as demand for electric vehicles rose in both countries,