The role of Elon Musk's SpaceX in an ambitious new U.S. missile defense system is in question following the dramatic feud last week between the billionaire entrepreneur and President Donald Trump, according to three people familiar with the project.

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President Donald Trump threatened to cut government contracts with Elon Musk amid feud, while the SpaceX CEO suggested decommissioning a spacecraft.

President Trump has responded to Elon Musk’s apology after the former “first buddy” admitted late Tuesday he had gone “too far” in his personal attacks on the

The Tesla CEO's quick reversal after his blow-up with the president communicates quite a lot, one expert in political science says.