The closely matched probabilities across turnout ranges for North Carolina’s 2026 U.S. Senate election reflect uncertainty around overall participation in a contest between Democrat Roy Cooper and Republican Michael Whatley. Democratic voters show higher levels of interest and motivation to vote in recent surveys, while Republican certainty to participate has softened, creating offsetting pressures on expected ballot volume. Both campaigns are emphasizing ground operations, early voting, and absentee ballot outreach ahead of November 3, consistent with historical midterm patterns in the state. Trader consensus remains spread across the 3.5–4.7 million range because the race’s competitiveness and enthusiasm dynamics have not yet produced a clear signal on final participation. Late shifts in national political momentum, intensified get-out-the-vote efforts, changes in voter registration data, or Election Day weather and logistics could widen separation among the ranges.