The Iowa Senate and Governor combination market assigns its highest probability (52%) to Democrats winning the governorship while Republicans hold the Senate seat, reflecting polling averages that show Democratic nominee Rob Sand leading Republican Zach Lahn by roughly 6–7 points in the open governor’s race. The Senate contest between Republican Ashley Hinson and Democrat Josh Turek registers as a toss-up, with recent surveys through mid-to-late October placing the candidates within 2–3 points and producing a polling average near even. Trader pricing on the split outcome incorporates Iowa’s Republican-leaning voter registration edge offset by Sand’s strong statewide profile and elevated early voting participation. Factors sustaining the tightness include independent voter preferences, rural turnout patterns, and the impact of national economic conditions on the final two weeks before the November 3 election. Shifts in late-cycle polling or differential turnout between suburban and rural areas could alter probabilities for either split or sweep scenarios.