Rep. Andy Barr leads trader consensus at 70.5% implied probability in the Kentucky Republican Senate primary due to his edge in the latest Emerson College/FOX56 poll from early April, capturing 28% support among likely GOP primary voters amid over 25% undecideds, and his sustained fundraising advantage reported April 15. Former Attorney General Daniel Cameron trails at around 19% market odds after slipping from earlier leads, while self-funded challenger Nate Morris holds 8% following a March debate among the top three contenders. With the May 19 primary approaching, Barr's incumbency as a six-term congressman and recent endorsements like swimmer Riley Gaines bolster his frontrunner status in the open-seat race to succeed retiring Sen. Mitch McConnell, though high undecideds signal potential volatility from late endorsements or attack ads on issues like immigration.