While polls show the 2024 presidential race between former President Trump and Vice President Harris are neck and neck heading into Election Day, with the GOP candidate considered a strong winner in almost all betting markets.

Traders on the crypto-based Polymarket, the largest prediction market, as of Monday afternoon saw Trump have a 58.1% chance of retaking the White House, compared to 41.9% for Harris.

Republican presidential candidate former U.S. President Donald Trump gestures as he takes the stage for a campaign rally on October 12, 2024 in Coachella, California. (Mario Tama/Getty Images / Getty Images)

On the US-based platform Kalshi, traders saw Trump with a 55% chance of winning, while Harris had a 45% chance.

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Trump is also expected to win, according to all prediction markets tracked by RealClearPolitics. The RCP betting odds data gives the former president an overall 57.9% chance of winning the election, compared to 40.7% for Harris.

Vice President and Democratic presidential candidate Kamala Harris speaks during a campaign event in Charlotte, North Carolina, November 2, 2024. (CHARLY TRIBALLEAU/AFP via Getty Images / Getty Images)

However, there is one notable exception. Bettors on PredictIt slightly favored Harris, giving the vice president a 55% chance of winning on the eve of Election Day, compared to 53% for Trump.

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Critics argue that election-based betting markets pose a threat to democracy, but supporters argue they are a better indicator of the outcome of a race than polls.

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The latest NBC News national poll released over the weekend showed Trump and Harris in a dead heat, each favored by 49% of Americans, with 2% of voters saying they were still undecided.