Kalshi Drops President's Son Over Polymarket Involvement

Donald Trump Jr.'s contract ended after 1789 Capital boosted its stake in rival

Kalshi has cut ties with a Trump while members of Congress gear up to scrutinize his family. The prediction market startup confirmed Thursday that it ended Donald Trump Jr.'s advisory role after his venture firm, 1789 Capital, boosted its investment in rival Polymarket and led its latest funding round -- an apparent conflict that Kalshi says drove the move. Trump Jr., who joined as a "strategic advisor" in January 2025 with an equity stake reportedly worth about $300,000, was approached by Kalshi in the fall to unwind the arrangement, Reuters reports.