Will the Republicans win the Nebraska Senate race in 2026?

Logged 31 Oct 2026, 13:00 UTC · Brier 0.0298

• Republican incumbent Pete Ricketts is the nominee of the state's dominant party; Nebraska has not elected a Democrat to the Senate since 2006, and the resolution rule counts only the Republican nominee as 'Republican', so Ricketts winning resolves YES.
• The only credible challenger, Dan Osborn, is a by-petition independent, and under the settlement rules an independent win does not count for either major party, which removes the risk of a party-label ambiguity.
• The final NYT/Siena poll published October 31, 2026 shows Ricketts leading Osborn 49-43; a 6-point lead four days before Election Day converts at a high rate, though Siena polling of independent candidates in Nebraska (Osborn outran his 2024 polling against Fischer) has historically understated his support, so the true margin is likely tighter.
• With the election on November 3 and the market closing November 4, there is essentially no time for the race fundamentals to change; the main residual risks are polling error and the unusual dynamics of an independent consolidating anti-incumbent votes, which cut both ways.
• A single 6-point poll lead is an anchor, not a distribution; treating it as decisive would be overconfident given Nebraska's recent history of competitive independent Senate bids, so the estimate stays below 0.90 despite the structural lean.

What would change it: Late-breaking evidence that Osborn has consolidated undecided and Democratic-leaning voters, such as a final reputable poll showing the race within 2 points or Osborn ahead, would push this estimate toward or below 0.50.

+4.2 probability points from the market at generation · med confidence · Polymarket

Base rate: No verified Nebraska-specific Republican Senate win rate was retrieved, so the base rate is stated from general knowledge of the class: Republican Senate candidates in Nebraska have won every Senate race since 2008, and incumbents of a state's dominant party facing only independent challengers win the large majority of the time, roughly 80-90%.

Chosen by Crossbook's published selection rule (auto-v2), not by hand.

Formed blind at 87.0%, without sight of the price; published at 82.8%, the market’s 78.5% moved 50% of the way toward it by fixed rule. None of the cited facts could be shown to be one the market had not already priced. That check is recorded, not enforced.