More than $4 billion: That's how much experts anticipate have been spent trying to win your vote. It's the most expensive election in U.S. history. With the Supreme Court ruling on Citizens United in 2010, the floodgates opened, allowing outside groups to spend record amounts: more than $970 million for this election cycle alone. Who exactly spent this kind of money may surprise you. Election spending doesn't just come from hedge-fund managers and people with big family fortunes anymore. It's an eclectic group: a 21-year-old college student is spending his inheritance on his own conservative super PAC, a man with a species of monkey named for him, an expert in heirloom plants, a speech recognition expert who spends his free time playing with model trains in his basement. Check out these fascinating people and the nonprofits that placed a big bet on this election.