Elon Musk's empire isn't exactly crumbling, but it looks increasingly vulnerable as his falling out with President Trump intensifies. Why it matters: The world's richest person enjoyed ballooning wealth in the early days of his alliance with the president,

Tesla shares sank Monday after CEO Elon Musk announced he would form a new political party in an escalation of his feud with President Donald Trump.

Musk, who had been a close ally of the president, announced on X Saturday that he would be forming the “America Party.” His decision was based on an X poll that he posted on July 4, where he asked users on the social media website if there should be an America Party.