"I just got word that the Trump campaign HQ literally found out they were winning from Polymarket," wrote Polymarket founder and CEO Shayne Coplan, on X early Wednesday morning. "History was made today."

A week later, history of a different sort was underway.

Around 6 a.m. on Wednesday morning, the FBI arrived at the CEO's Soho home with a warrant as part of an investigation into claims that the betting platform accepted trades from users based in the U.S., according to Bloomberg. Federal agents confiscated Coplan's phone and electronic devices.