Time flies when you're floating aimlessly through the cold, inhospitable wasteland that is space. And it's already been seven years since SpaceX test-launched its powerful Falcon Heavy rocket, shooting founder Elon Musk's personal Tesla Roadster into space.

In January, sales of Tesla cars slumped across five European countries – the UK, France, Sweden, Norway and the Netherlands. Sales were down too in California – the US state with the largest car market. And according to at least one survey, Musk and his politics could be a significant part of the problem.