The country's most powerful man and its wealthiest man exchanged words after President Joe Biden made a dig at Musk over a widely circulating report he hopes to shed a large portion of his company's workforce.
Biden pointed to several other American companies adding to their workforces, saying he wished Musk luck on his trip to the moon.
The first human expedition to the moon in decades was led by Musk's SpaceX.
Musk wrote "Thanks Mr. President!" and linked to a NASA article about its partnership with the space company.
It was Musk's first public acknowledgement of the report that caused his company's shares to tank.
Musk pinned a reply to Biden's barb.
Biden and Musk have fought before. Despite being the largest electric vehicle manufacturer in the country, the president didn't inviteTesla to a White House event on electric vehicles. Musk has accused Biden of shunning his company many times, and has become more vocal recently in expressing disdain for Biden. Musk endorsed the Democratic candidate for Los Angeles mayor. According to Forbes, Musk is the most valuable person in the world.
The value of the shares of the company fell after Musk said the economy was "super bad".
According to reports, Musk wants to lay off 10% of his workforce.
Musk supports the candidacy of a billionaire for the mayor of Los Angeles.