Donald Trump and Elon Musk exchanged back-and-forth insults online after a disagreement over the president's spending bill. Here's a complete timeline of Donald Trump and Elon Musk's friendship, including why they are now feuding.

A reunion of the world's richest man and the most powerful may not be imminent, but at least one of them has now expressed his regrets as their relationship lies in ruins.Elon Musk said on X in the early hours of Wednesday that he “regrets” some of the barbs he posted as he and President Donald Trump traded insults on social media and said they “went too far.