The market's leading probability on 13–13.5 million votes reflects expectations for moderate turnout in California's open gubernatorial contest between Democrat Xavier Becerra and Republican Steve Hilton. Becerra's consistent 15–20 point lead in late polls has produced limited overall enthusiasm, while the state's heavy reliance on mail ballots and roughly 23 million registered voters point to totals near recent off-year benchmarks rather than record highs. The June primary's elevated participation provides a baseline, but the lopsided general-election dynamics and early ballot-return trends through early October have kept trader consensus clustered in the low-to-mid 13 million range, with narrower bands priced lower due to uncertainty around final mobilization efforts.