The betting markets currently have Donald Trump at a 62% chance of winning Tuesday's election, but this is based on the bettors' models that rely on social media engagement, which may not accurately reflect the sentiment of the electorate.

Over the past several weeks, Harris slid slightly, then the race tightened again, with Harris even briefly becoming the favorite. Tuesday, the Insider predicts, “will be a roller-coaster day.” Some betting experts believe a bet on Trump could be a simple wager that he’ll win Pennsylvania and cut off Harris’ most likely path to 270 electoral votes.