Kalshi suspended Republican House candidate Laurie Buckhout for three years after finding that she traded contracts linked to her own race against Democratic Representative Don Davis in North Carolina's 1st Congressional District. Buckhout purchased less than $1,000 in contracts and agreed to pay a $2,589.96 penalty, while accepting the findings and the ban. Kalshi rule 5.17(z) prohibits traders with direct or indirect influence over an event from trading its contract, a provision that applies to candidates on the ballot. The prediction market said Buckhout cooperated with its inquiry. The action came as Kalshi also imposed its first-ever lifetime ban on former congressman George Santos and a fine of more than $70,000 after he refused to cooperate with investigators. Days earlier, the CFTC (U.S. derivatives regulator) and Kalshi acted against a White House teleprompter operator over bets on Trump's speech text. Kalshi introduced three market integrity measures in June, while Representative Bryan Steil filed a June bill that would bar lawmakers from betting on political outcomes and impose fines and forfeited gains.