These questions are being raised on the campaign trail, after VP candidate Tim Walz joked in a speech Tuesday that Musk was effectively Trump’s VP pick. In a made-for-memes moment, Walz wondered why Musk had started “dancing like a dipshit” at the former president’s rallies.

Musk, the richest man in the world with a net worth of $242 billion, according to Forbes, has pledged to give away $1 million a day to voters for signing his political action committee's petition backing the Constitution, a pledge experts say raises legal questions.

Mr. Musk, a megadonor, had flummoxed some Trump advisers by previously declining to write a “super max” check directly to the former president’s campaign.