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Why do prediction markets like Graham Platner so much?

Prediction markets Polymarket and Kalshi show Platner with about a 69% chance to win the Maine Democratic Senate primary, reflecting strong grassroots support and market confidence.

Platner is leading Gov. Janet Mills on Polymarket and Kalshi, websites that allow betting on elections, sports and current events that some experts say can be better predictors of election results than polls.

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Portland Press Herald broke the news in Portland, United States on Tuesday, December 9, 2025.
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