More people are betting on this election than ever before

Will Hillary Clinton or Donald Trump be the next president of the United States? That is the million-dollar question.

Well, answering it correctly could earn you a chunk of change, anyway. As the polls tighten on the eve of Election Day, Reuters reports that the 2016 presidential campaign is on track to be the most wagered-upon political event in history.

Betfair, a U.K.-based online exchange, reports that predicting the "next president" of the U.S. is expected to even surpass Brexit betting. On Sunday, Betfair reported that $130 million had been traded on U.S. presidential predictions, while Brexit topped out at $159 million. "We think it is because [of] how raw the Brexit [vote] is in people's minds — they're not convinced yet that it's a done deal," Betfair spokeswoman Naomi Totten said. (U.S. law significantly limits betting on elections in the United States).

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Paddy Power, an Ireland betting site, said that while it mostly makes money off of sports events, the 2016 race looks like it will crack the website's 10-most-traded events ever. Ladbrokes, another U.K. gambling site, said the 2016 race has "at least double[d]" the money wagered in 2012's election.

Who, then, are people putting their money on? All three websites posted an 83 percent chance of a Clinton victory.