#TrumpVsMusk The feud between two of the world's most powerful billionaires shows no sign of ending after the US president claimed on Friday that the richest man in the world had "lost his mind".
Even though observers have long speculated that Donald Trump and Elon Musk would eventually fall out, few predicted the speed and ferocity with which their social media beef erupted.
A phone call that was reportedly due to happen on Friday didn't, and Trump is reportedly considering selling the red Tesla that he purchased from Musk's company in March. Their falling out over US government spending could have far-reaching implications for American industry.
Since Musk pledged his full-throated support for the president following an assassination attempt in Pennsylvania less than a year ago, the political and business interests of the two men have become increasingly intertwined.