The numbers
https://www.actionnetwork.com/politics/election-odds-predictions-trump-biden-betting-presidential-race-2020
Who has payed out already?
https://www.gamblingnews.com/news/sportsbet-calls-biden-a-winner-pays-out-23m-for-us-presidential-election/
Who Bet Big?
https://www.cnn.com/2020/11/02/business/us-presidential-election-million-pound-bet/index.html