Kalshi ends advisory contract with Donald Trump Jr. over Polymarket stake

The termination shows prediction markets now treat affiliation as a competitive risk, not just a marketing asset. Trump Jr.'s dual position — adviser to one platform, investor in another through 1789 Capital — was untenable once the Polymarket stake was in place, and Kalshi's framing of a mutual split suggests both sides preferred a clean exit to a public dispute. The signal matters for how these venues vet high-profile advisers as the sector's competitive lines harden. Whether other platforms adopt similarly strict conflict screens is the open question.