Elon Musk's break with the Trump administration means investors will hope he refocuses on his sprawling empire as Tesla battles slumping sales and after SpaceX's latest rocket launch fell short of expectations.

Investors in Elon Musk 's car company, Tesla, have called on Musk to work at least 40 hours a week at the company.

The White House confirmed to Reuters that Musk's offboarding began last night following a decision 'at a senior staff level.'

The Tesla boss said he was back to working "24/7" and that he needed to focus on his companies, including Tesla. The stock is up sharply since April lows.

Tesla’s stock is rallying as investors cheer a return of Elon Musk as a full-time CEO, and is fast approaching a key chart level that if cleared could target a return to record levels.