The market's tight spread between the 1.5M-1.6M and 1.6M-1.7M turnout bins reflects expectations for moderate participation in Kentucky's open U.S. Senate contest. With Republican Andy Barr holding a roughly 10-point polling edge over Democrat Charles Booker in a state rated safe Republican, lower competitiveness compared to battleground races typically limits mobilization intensity among both parties. Roughly 3.37 million voters were registered as of July, providing a broad base, though historical Senate election turnout in the state has often fallen in this range absent high-stakes national drivers or intense get-out-the-vote efforts. Factors such as early voting access, candidate-driven field operations, and any late-cycle national developments could still shift final numbers within the resolution window.