Musk’s management style has always been a lightning rod. His focus on speed and impatience allows him to advance technologies at a breakneck pace.

A sobering quarterly report puts more prssure on Tesla’s chief executive to make good on his promises for fully autonomous vehicles.

The Trump administration will make it easier to deploy self-driving cars on US roads and loosen crash reporting requirements, the most significant changes yet to federal rules on autonomous vehicles championed by Tesla chief executive Elon Musk.