Sources: Polymarket will raise $1B led by 1789 Capital at a $21B post-money valuation; Donald Trump Jr. is a partner at 1789 and adviser to Polymarket (Amanda L. Gordon/Bloomberg)

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Amanda L. Gordon / Bloomberg : Sources: Polymarket will raise $1B led by 1789 Capital at a $21B post-money valuation; Donald Trump Jr. is a partner at 1789 and adviser to Polymarket   —  Venture capital firm 1789 Capital is leading a new funding round for Polymarket that will give the prediction-markets platform a $21 billion post-money valuation.