The pair have been inseparable since the election, with Mr Musk accompanying Mr Trump to Washington to meet Republicans in Congress and Mr Trump heading to Texas with Mr Musk to watch a test flight of a rocket built by SpaceX,

The world’s richest person, not known for his humility, is still learning the cutthroat courtier politics of Donald Trump’s inner circle — and his ultimate influence remains an open question.

Writing on the Wall These days, it feels like everyone's trying to figure out how long Elon Musk and Donald Trump's new bromance could possibly last, and an answer has just started to materialize: not much longer.