There’s Donald Trump building his case to be President in part on his business record; there’s fellow Republican Carly Fiorina, the former tech CEO; and the possibility emerged this weekend that former Wall Street financial whiz and media tycoon Michael Bloomberg is at least exploring the idea of running as an independent. The New York Times reported that a Trump versus Sanders ballot would especially motivate the former New York mayor to run, perhaps using a billion dollars of his own money.

Click the player above for a refresher on how Bloomberg made his billions.