“Bannon is such a r——d liar,” Musk raged on his social media platform in the very early morning hours, using a slur for people with intellectual disabilities.

A reduced role for SpaceX would represent the first known setback to Musk's huge volume of business with the U.S. government since his break with Trump last week.

Musk apologized after Vice President JD Vance and White House chief of staff Susie Wiles reached out to him and urged him to end the feud, according to two sources familiar with the matter.