US midterm elections are constitutionally required every two years for the full House and one-third of the Senate, establishing a fixed schedule that has held through wars, recessions, and prior national emergencies. With the November 3, 2026, date approaching and no active legislation, court rulings, or executive actions indicating postponement, traders assign a 99.5% implied probability to the elections occurring on time. Historical precedent shows elections proceeding even amid significant events, reflecting institutional continuity and state-level administration. Scenarios that could still shift outcomes include a sudden nationwide crisis triggering emergency powers, widespread infrastructure failure, or last-minute congressional action, though such developments remain rare and would require rapid legal validation to alter the timeline.