Elon Musk is making some big promises while campaigning for former President Donald Trump. But his business record calls into question whether he can deliver.

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.

Elon Musk has made himself into an influential factor in Donald Trump's reelection campaign, but his ascension hasn't always been smooth.