The closely contested open-seat New Hampshire Senate race between Democrat Chris Pappas and Republican John Sununu, with recent polling averages showing Pappas ahead by roughly five to six points, underpins trader emphasis on the 600K-700K turnout range. Midterm dynamics in this battleground state, featuring candidates with strong name recognition and no incumbent advantage, typically generate elevated but variable participation relative to presidential cycles. Higher Democratic primary turnout in September, combined with ongoing uncertainty over independent and base mobilization in a state with many undeclared voters, supports the leading 650K-700K and 600K-650K buckets. Late-cycle spending, get-out-the-vote efforts, and Election Day weather on November 3 remain key variables that could shift probabilities in either direction before voting concludes.