A Donald Trump supporter has responded to Joe Biden, who accused him of running an illegal business.
Elon Musk called the US President a "puppet" and accused him of lying.
The billionaire responded to the accusations against him on social media.
Musk first noted ironically that Biden was suddenly concerned about migrants.
The current US leader has been criticized for his soft immigration policy, which has left the state system struggling to cope with the influx of foreigners.
Musk himself was born in South Africa and came to the United States in the mid-1990s to pursue higher education.
The Washington Post claims that Musk did not go to college, focusing on business.
This was a violation of immigration laws, as the South African native lost his right to be in the United States.
Biden was asked to comment on the situation. He noted that "the richest man in the world was an illegal worker."
Poking fun at Biden's concerns about the "immigration issue," Musk added that the president was lying: "I was actually allowed to work in the U.S. Puppet Biden is lying."