U.S. President Donald Trump on Thursday dismissed criticism from close ally Elon Musk about a $500 billion artificial intelligence project that Trump announced with great fanfare at the White House earlier this week.

Elon Musk has cast doubt on Donald Trump’s $500 billion AI project by questioning whether it has enough financial backing. “They don’t actually have the money,” the MAGA billionaire wrote on X in a rare public dig at Trump just hours after the president made a big announcement about the privately funded initiative.

I would prefer to stay out of politics,” Elon Musk told his followers in 2021, on the platform then known as Twitter. Plenty has changed since then. The world’s richest man appears to have a new goal: upending Europe.