Wed, Jul 22 09:36 AM

The 'Bad Blood' Between Polymarket's Shayne Coplan and Kalshi's Tarek Mansour

Hacker News•Mon, Jul 20, 2026, 10:31 AM•2 min read

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Source: [Hacker News](https://www.nytimes.com/2026/07/19/technology/polymarket-kalshi-rivalry-coplan-mansour.html)

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