The closely contested open U.S. Senate race between DFL nominee Peggy Flanagan and Republican Michele Tafoya, running alongside competitive gubernatorial and state legislative contests, forms the core driver of trader expectations for Minnesota turnout on November 3. Recent September polls showing a statistical tie or narrow Flanagan lead, combined with elevated Democratic primary participation relative to 2022 patterns and ongoing early voting, have supported positioning around the 2.75M–2.9M range. Key variables include mobilization around issues such as state government fraud scandals and affordability, the presence of third-party candidates, and historical midterm participation rates in a state with strong absentee and early voting infrastructure. A surge in one party's base enthusiasm or late shifts in undecided voters could consolidate support for higher or lower brackets before Election Day.