Donald Trump Jr. ended his paid advisory role at prediction-market company Kalshi on Thursday, after his investment firm increased its investment in Kalshi competitor Polymarket.
Kalshi said the departure was a mutual business decision. Trump Jr.'s firm, 1789 Capital, has invested heavily in Polymarket, which the reports describe as Kalshi's biggest competitor. The Washington Examiner reported that Trump Jr. joined Kalshi as a strategic adviser after his father's 2025 inauguration and later joined Polymarket's advisory board.
The Guardian reported that Democrats plan to investigate investments by the Trump family.