Incumbent Republican Mike Carey and Democratic challenger Don Leonard remain closely matched in Ohio's 15th congressional district, with recent Hart Research polling from late September showing Leonard at 46% and Carey at 45%. The new congressional map has shifted the district's partisan baseline into a narrower R+5 range, elevating its competitiveness compared to prior cycles and drawing Democratic targeting resources. Fundraising edges favor Carey, yet Leonard's primary performance and turnout efforts have narrowed the gap in this battleground seat. Trader consensus on small Republican margins reflects the district's structural lean alongside uncertainty over national midterm conditions and turnout among swing voters in central Ohio suburbs. Upcoming campaign events and any late polling shifts could widen or close the race before November 3.