The Polymarket 'whale' betting on a Trump win is down $3 million after Harris' odds jumped over the weekend

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• The Polymarket "whale" betting on a Trump win had about $3 million in unrealized losses Monday morning.
• The closely watched bettor had over $10 million in gains before Trump's odds declined last week.
• The person controls a significant portion of contracts tied to a Trump win, with about $30 million wagered.

The "whale" placing big bets on Polymarket for Doland Trump to win the presidential election is in the red after betting odds shifted toward Kamala Harris' over the weekend.