Tennessee’s open gubernatorial race, with term-limited Republican Bill Lee leaving the seat, stands as the primary driver lifting expected turnout above typical midterm levels in a state that usually ranks near the bottom nationally. Traders have priced the 2 million to 2.2 million vote range highest because an open governor’s contest historically adds several percentage points to participation when combined with contested down-ballot races, yet the solidly Republican Senate matchup between incumbent Bill Hagerty and Democrat Marquita Bradshaw limits broader mobilization. Recent August primaries showed elevated early voting statewide and a notable Democratic surge in Shelby County tied to redistricting, providing fresh evidence of localized enthusiasm that could modestly expand the electorate without pushing totals into higher bins. National political climate, independent voter engagement, and any late-cycle ballot measures remain the main variables that could shift volume into adjacent ranges.