Donald Trump Jr. exits Kalshi after Polymarket investment

The prediction market sector is undergoing a period of heightened scrutiny following the 2026 midterm elections. Against this backdrop, Kalshi announced on Thursday that Donald Trump Jr. has stepped down from his position as a paid adviser.

The company characterized the separation as a mutual business decision. The primary driver was a financial move by Trump Jr.'s investment vehicle, 1789 Capital, which increased its stake in Polymarket. This transaction was finalized during a fundraising round in August 2025. By taking a larger position in Kalshi's main rival, the Trump family now holds substantial interests in both leading platforms in the industry.

The timing of the exit aligns with a recent shift in congressional power. Democrats won control of the House and Senate one week ago. The party has signaled its intent to investigate the Trump family's business ties, specifically focusing on their involvement in the prediction market sector.

Dani Lever, a spokesperson for Kalshi, confirmed the arrangement in a written statement. She noted that the parties agreed to conclude the advisory role after the investment in a competitor was completed earlier in the summer. Lever said the company valued Trump Jr.'s help in expanding marketing efforts to reach new customers.

Trump Jr. originally joined Kalshi in January 2025, shortly after the president began his second term. He served in a dual capacity, acting as a strategic adviser while also holding an investment in Polymarket since August 2025. This overlap has drawn attention from financial observers and political analysts alike.

Both Kalshi and Polymarket have benefited from a supportive regulatory environment under the current administration. The Commodity Futures Trading Commission has approved moves to expand product offerings nationwide. This includes allowing customers to trade contracts based on sporting events, a change that has broadened the appeal of these markets to the general public.

Despite the visible financial links between the Trump family and the sector, both companies have denied that personal interests influenced regulatory decisions. They maintain that the CFTC's actions were based on standard market principles. The potential end of the advisory role first emerged when 1789 Capital finalized its increased investment in Polymarket last August, prompting the restructuring of the current arrangement.