A number of Donald Trump critics have mocked Elon Musk over his appearance alongside the former president at a Pennsylvania rally. Musk, the billionaire owner of X, formerly Twitter, and CEO of SpaceX and Tesla,

Get everyone you know, and everyone you don't know, drag them to register to vote,” said Elon Musk at a rally in Butler, Pennsylvania. “If they don’t, this will be the last election. That’s my prediction.

Billionaire Elon Musk, who is the US's richest person, jumps around on stage in support of Donald Trump at one of his election campaign rallies.