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Illustration: Aïda Amer/Axios. Photo: Alexey Yurenev/Bloomberg via Getty Images

Kalshi is putting in place new tools to prevent minors from trading on the prediction market, but is resisting calls to block ages 18-20.

Why it matters: Prediction markets are surging in popularity as a way to risk money on sports, politics and news — but they're also facing mounting political scrutiny over their contribution to America's gambling culture.