Elon Musk stepped back from his explosive feud with U.S. President Donald Trump, writing on X that he regrets some of his posts about his onetime ally.

Elon Musk called President Donald Trump on Monday night, two sources familiar with the conversation told ABC News.

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.

It remains to be seen how Mr. Trump will handle the attempted rapprochement and whether the two men’s relationship can be restored.

Elon Musk reached out and talked privately to President Donald Trump before the billionaire entrepreneur apologized for his harsh personal attacks.

The the administration ordered the agencies to scrutinize Musk’s contracts to ready possible retaliation against the businessman and his companies, sources said.

Elon Musk says he regrets some of his recent criticisms of President Trump, in the wake of their public falling-out last week. Musk says some "went too far."

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