Taking to their respective social media platforms, Trump threatened to cut Musk’s government contracts, while Musk said Trump would not have won in November without him.

The alliance between President Trump and Elon Musk went up in flames Thursday, days after the world's richest man left the administration and tried to wield his influence to kill a massive budget bill that is central to enacting the president's top legislative priorities.

Musk announced his company, SpaceX, will withdraw from service its Dragon spacecraft — critical to the American space program.