Closest Senate race in 2026?

Before Jan 3, 2027 If X has the smallest margin of victory among all elections in the 2026 United States Senate elections as of Jan 3, 2027, then the market resolves to Yes. Margin of victory is calculated as the absolute percentage point difference between first and second place finishers. For two-candidate races, this is winner's percentage minus runner-up's percentage. For multi-candidate races, only the gap between first and second counts. For yes/no referenda, it's the absolute difference