Will Kansas US Senate have the largest margin of victory in the November 3, 2026 general elections for Kansas US Senate and Nebraska US Senate?

- [2026-10-10] Kansas Senate (Marshall R vs. Hamilton D): RCP polling average (polls 9/8–10/4) shows Marshall(R) 45.6% and Hamilton(D) 45.4% , a margin of just ~0.2 points, with individual recent polls ranging from Hamilton+3 (YouGov) to Marshall+5 (co/efficient) and a 10/1 Trafalgar poll showing a tie (44-44). Source: https://www.realclearpolling.com/polls/senate/general/2026/kansas/marshall-vs-hamilton - [2026-10-08] National Republicans are pouring money into Kansas: the Senate Leadership Fund plans to invest $14 million to support incumbent Sen. Roger Marshall, much of it on ads attacking Democratic candidate Adam Hamilton , while Senate Majority PAC (Dem) has also engaged — signaling both sides view the race as genuinely close. Source: https://www.dailykos.com/stories/2026/10/7/800108321/community/the/ - [2026-10-06] CNBC reports Republican Sen. Roger Marshall suddenly finds himself in a competitive race with weeks to go until the 2026 midterm elections, in a state Donald Trump carried by 16 points in 2024 , though Marshall retains a sizable cash advantage, and Kansas' long Republican Senate history gives the GOP reason for confidence . Source: https://www.cnbc.com/2026/10/06/kansas-election-senate-marshall-hamilton.html - [2026-10-07] A Hamilton-campaign GBAO poll (not in RCP average) showed Hamilton leading by 5, reinforcing that the race is trending toward Hamilton; an attack ad about Marshall's medical billing practices has dominated recent coverage. Source: https://www.dailykos.com/stories/2026/10/7/800108758/elections/kansas-senate-marshall-hamilton-medical-bill-ad/ - [2026-10-10] Nebraska Senate (Ricketts R vs. Osborn I): RCP polling average/recent polls show the race essentially tied — co/efficient (9/28-9/30): Ricketts 48, Osborn 43 (Ricketts+5) ; a YouGov poll (9/24-10/3) showed Dan Osborn (I) leading Pete Ricketts (R) in the U.S. Senate race, 48% to 47% . Source: https://www.realclearpolling.com/polls/senate/general/2026/nebraska/ricketts-vs-burbank-vs-osborn and https://politicalwire.com/2026/10/06/osborn-edges-ricketts-in-nebraska-senate-race/ - [2026-10-03] Poliwave's aggregate forecast through Oct 3 has Pete Ricketts (R) narrowly ahead by 0.6 points, with poll averages of 47.2% Ricketts to 46.3% Osborn — a near dead heat comparable to Kansas's margin. Source: https://www.poliwave.com/us/ne/sen-fed - [2026-10-08] Pollsmax's 10-poll average has Pete Ricketts leading Dan Osborn by 1.2% in the Pollsmax polling average, 47.4% to 46.2% . Source: https://www.pollsmax.com/senate/nebraska/ - [2026-08-27] Nebraska is historically much more Republican than Kansas at the presidential level: In 2024 Democrats didn't even field a candidate against Fischer; independent Dan Osborn held her to a seven-point win, the best showing against a Nebraska Republican in almost two decades ; Ricketts himself won a 2024 special election by 25 points . Kansas by contrast elected Marshall by only 11.4 points in 2020. Source: https://www.realclearpolling.com/polls/senate/general/2026/nebraska/ricketts-vs-burbank-vs-osborn - [2026-10-02] Two former Kansas Republican governors have publicly endorsed Hamilton, and Republican enthusiasm/favorability for Marshall is weak (41% favorable/48% unfavorable per Emerson), underscoring genuine erosion of GOP position in Kansas. Source: https://emersoncollegepolling.com/kansas-2026/ ; https://www.dailykos.com/stories/2026/10/7/800108321/community/the/ - [2026-10-01] Nebraska's Osborn favorability has been improving (net +4) despite ~$3 million in Ricketts attack ads, per an Osborn-aligned pollster, indicating the NE race also remains volatile and close heading into November. Source: https://chadronradio.com/new-poll-dan-osborn-is-tied-with-pete-ricketts-in-critical-nebraska-senate-race-2/ - [2026-10-10] Both RCP and independent aggregators (PollingSource, Poliwave, Pollsmax) rate both Kansas and Nebraska as "Toss Up," with polling-average margins in both races sitting within roughly 0.2–5 points depending on methodology/house effects — no clear structural gap currently separates the two margins. Sources: https://www.realclearpolling.com/polls/senate/general/2026/kansas/marshall-vs-hamilton ; https://www.realclearpolling.com/polls/senate/general/2026/nebraska/ricketts-vs-burbank-vs-osborn BOTTOM LINE: As of October 10, 2026, both Kansas and Nebraska Senate races are polling as near-toss-ups with averaged margins of roughly 0.2–1.2 points, meaning which state ultimately has the larger margin of victory is currently a close call with no decisive structural lean; Kansas has trended tighter/more Democratic-favorable in the last two weeks (national GOP money pouring in, former-governor defections) while Nebraska's polling has bounced between Ricketts+5 and Osborn+1, so the outcome likely hinges on late momentum and turnout in both states. NOT FOUND: No general-election exit polling or early/absentee vote data is yet available for either state; could not find any post-October-8 poll releases beyond the YouGov (Oct 3-6) survey; no Kalshi-specific pricing was sought per instructions.

- [2026-10-01] Decision Desk HQ forecast (blending fundamentals, polls, markets) gives Roger Marshall a 77% probability of winning Kansas, with a projected margin of R +8 . https://votes.decisiondeskhq.com/races/2026-11-03/kansas-us-senate-general-election - [2026-10-04] Poliwave's Kansas model shows Roger Marshall leading by 7.0 points in its forecast as of polls through Oct 4, 2026, with a poll average margin of Hamilton 47.1% to Marshall 45.4% , versus a 2020 result of R+11.4. https://www.poliwave.com/us/ks/sen-fed - [2026-10-06] Pollsmax's Kansas forecast projects Marshall to receive 52.4% of the vote compared with 47.6% for Hamilton, a projected Republican margin of 4.8 percentage points , rating the race Lean Republican. https://www.pollsmax.com/senate/kansas/forecast/ - [2026-10-06] PoliAgg's live model gives Marshall a 96% win probability with a forecast rating of "Likely R, R +13.9," though the contest's raw polling margin is exactly 0.0 points and rated a Tossup . https://poliagg.com/race/us-senate-2026-ks/ - [2026-10-03] Poliwave's Nebraska model shows Pete Ricketts narrowly ahead by 0.6 points in its forecast as of polls through Oct 3, 2026 , far tighter than the 2020 Nebraska Senate result of R+38.3. https://www.poliwave.com/us/ne/sen-fed - [2026-10-06] Pollsmax's Nebraska forecast projects Ricketts to receive 52.3% of the vote compared with 47.8% for Osborn, a projected Republican margin of 4.5 percentage points , also rated Lean Republican — nearly identical in magnitude to its Kansas margin projection (R+4.8). https://www.pollsmax.com/senate/nebraska/forecast/ - [2026-10-10] RealClearPolling's latest poll average for Nebraska is essentially tied, showing a Ricketts +5 spread in the most recent co/efficient poll but an Osborn +4 result from SurveyUSA days earlier, underscoring high poll-to-poll variance. https://www.realclearpolling.com/polls/senate/general/2026/nebraska/ricketts-vs-osborn - [Historical 2014] In the last comparable "both states voting" cycle, Kansas had a much smaller margin than Nebraska: Kansas margin of victory was 10.6%, while Nebraska's was 32.9% . https://ballotpedia.org/United_States_Senate_elections,_2014 - [Historical 2020] Likewise in 2020, Marshall was elected in 2020 with 53.2% of the vote, winning by 11.4% , while Sasse's Nebraska win came with a 38.3% margin, the largest overperformance by any Republican US Senate candidate in the country that year . https://en.wikipedia.org/wiki/2020_United_States_Senate_election_in_Kansas, https://en.wikipedia.org/wiki/2020_United_States_Senate_election_in_Nebraska - [Historical 2024] Even in Nebraska's special election with a underfunded Democratic opponent, Ricketts defeated Preston Love Jr. 62.58% to 37.42% , a roughly 25-point margin, again dwarfing any recent Kansas Senate margin. https://en.wikipedia.org/wiki/2024_United_States_Senate_special_election_in_Nebraska - [2026 context] Nebraska's 2026 race is unusually close this cycle because independent Dan Osborn (who held Senator Fischer to a seven-point win in 2024 as an independent steamfitter-turned-candidate ) is again running a strong crossover campaign, and current polling has the race essentially tied (e.g., YouGov Oct 3 showing Osborn leading Ricketts 48% to 47% ), unlike the lopsided historical Nebraska Senate margins. https://politicalwire.com/2026/10/06/osborn-edges-ricketts-in-nebraska-senate-race/ BOTTOM LINE: Historically (2014, 2020, 2024), Nebraska Senate races have resolved with far larger margins than Kansas, which would make "Kansas has the largest margin" a low base-rate (NO-leaning) outcome; but 2026 breaks that pattern because Osborn's independent candidacy has made Nebraska a genuine toss-up (forecast margins near 0–5 points) while Kansas is also only a modest single-digit-to-low-teens lean-R race, so the historical base rate is only weakly informative this cycle and current model margins for the two races are close enough that either could "win" the margin comparison. NOT FOUND: No aggregator explicitly computes a probability that Kansas specifically will have the larger margin between the two races; no official 2026 betting-market or forecaster commentary directly addressing this comparative margin question was found.

YES means: Kansas's Nov-3 Senate margin (Marshall vs. Hamilton) ends up numerically larger than Nebraska's Senate margin (Ricketts vs. Osborn), triggering the "Kansas US Senate" resolution on this market. - [2026-10-06] PoliAgg's live fundamentals-based model puts the Kansas race at Predicted final margin R +13.9, with an 80% confidence interval of R+24.1 to R+3.6 — even the low end of that range (R+3.6) is comparable to or larger than most current Nebraska polling averages, and the point estimate is far above any Nebraska projection found. https://poliagg.com/race/us-senate-2026-ks/ - [2026-10-06] By contrast, Pollsmax's parallel model for Nebraska projects a materially smaller gap: the Pollsmax 2026 Nebraska Senate forecast currently gives Republican Pete Ricketts a 76.1% chance of defeating independent Dan Osborn, projecting Ricketts to receive 52.3% of the vote compared with 47.8% for Osborn, a projected Republican margin of 4.5 percentage points, rated Lean Republican — i.e., even model-based (not just topline poll) projections show Nebraska's expected margin well below Kansas's model-implied margin. https://www.pollsmax.com/senate/nebraska/forecast/ - [2026-10-06] Polymarket's dedicated Kansas margin-of-victory contract shows meaningful trader weight on a clear Marshall win: Marshall 0-5%: 40%, Hamilton Wins: 31%, Marshall 5-10%: 14%, Marshall 10-15%: 5%, Marshall 20-25%: 1% , meaning roughly a fifth of probability mass sits on Marshall winning by 5+ points. https://predictmarketcap.com/events/kansas-senate-margin-of-victory-2026 - [2026-10-09] Polymarket's parallel Nebraska margin-of-victory contract spreads probability across many bins with substantial mass on both very tight outcomes and GOP-favorable mid-single-digit outcomes: Republican 6-9% 17%, Republican 9-12% 16%, Republican 0-3% 15%, Independent 0-3% 14%, Republican 21%+ 1%, Republican 18-21% 2%, Republican 15-18% 4%, Republican 12-15% 11%, Republican 3-6% 17%, Independent 3%+ 14% — notably, roughly 29% of mass sits on a margin under 3 points either way, a scenario that would almost certainly be narrower than even a modest Marshall win. https://polymarket.com/event/nebraska-senate-margin-of-victory-2026 - [2026-10-09] Nebraska's structural Republican baseline remains far stronger than Kansas's at the top of the ticket: Trump won Nebraska by around 20 points , and Ricketts himself won his 2024 special election by nearly 30 points — if even part of that structural GOP advantage reasserts late (e.g., via the Trump rally effect, see below), Ricketts could still win by a larger-than-polled margin that nonetheless trails a reversion-driven Marshall landslide. - [2026-10-05] President Trump personally intervened to shore up Nebraska, as Donald Trump is set to rally for Sen. Pete Ricketts in Grand Island, Nebraska, as Republicans face a tight Senate race against independent Dan Osborn — but this same report notes Decision Desk HQ now gives Ricketts an 81 percent chance of beating the independent, down from 87 percent in August , confirming NE has been trending tighter, not wider, which helps the case that Kansas could end up the wider margin if Marshall's fundamentals-driven floor holds. - [2026-10-09] FiftyPlusOne's independent daily tracker shows both races within a single point on the same day — Oct 9 Hamilton +1, Hamilton 46.5%, Marshall 45.1% for Kansas and Oct 9 Ricketts +1, Ricketts 46.4%, Osborn 45.8% for Nebraska — meaning on pure polling-average terms the two margins are already essentially tied, so even a small late Marshall-favorable swing (e.g., from the $14M national GOP ad buy already documented) could be enough to put Kansas ahead in margin terms. - [2026-10-08] A Kansas prediction-market tracker still has Marshall's incumbency advantage and the state's long Republican tilt in federal elections continue to anchor trader consensus around a 62 percent implied probability of victory , while Decision Desk HQ's Nebraska coverage frames that race as Pete Ricketts narrowly leading independent Dan Osborn, the Democratic nominee withdrew to support Osborn, making it a mostly head-to-head contest — underscoring that Nebraska's unusually tight dynamic is a one-off creation of Osborn's independent crossover coalition, a structural asymmetry that does not have a Kansas analogue (Hamilton is a conventional Democrat in a state that has not elected one to the Senate since 1932, per Wikipedia). BOTTOM LINE: The clearest YES path is a "reversion to fundamentals" scenario: Kansas's incumbency/partisan-lean models (PoliAgg R+13.9, Decision Desk HQ R+8 per colleagues' notes) already project a materially larger Marshall margin than any Nebraska model projects for Ricketts (Pollsmax R+4.5, Poliwave R+0.6), and dedicated Polymarket margin markets assign real weight to Marshall winning by 5-15+ points while Nebraska's market spreads heavy weight across very tight (sub-3-point) outcomes — if late polling snaps back toward these structural/model baselines rather than the volatile raw toplines, Kansas plausibly ends up the wider margin. NOT FOUND: No market or poll aggregator explicitly computes the probability that Kansas's margin will exceed Nebraska's; no post-October-9 polling or early-vote data for either state was located.

YES means: Kansas's Nov 3, 2026 Senate margin (Marshall vs. Hamilton, % vote-share gap) is strictly larger than Nebraska's (Ricketts vs. Osborn), so the NO case to argue is that Nebraska ties or exceeds Kansas's margin. - [2026-10-06] Cook Political Report moved Kansas from "Lean Republican" to "Toss Up" on Oct 6, explicitly because of eroding GOP strength, while Nebraska's Cook rating sits one full tier safer at "Likely Republican" (last updated Apr 27, 2026) with a state Cook PVI of R+10 — a direct expert judgment that Nebraska's expected margin is structurally wider than Kansas's. https://www.cookpolitical.com/senate/race/488631 ; https://www.mediaite.com/politics/new-cook-political-report-officially-declares-toss-up-senate-race-in-kansas-where-a-democrat-hasnt-won-in-94-years/ - [2026-10-10] Ballotpedia's rating tracker shows all four major handicappers (Cook, Inside Elections, Sabato, DDHQ) still classify Nebraska no worse than "Likely Republican," whereas none currently rate Kansas above Toss Up, reinforcing that the consensus expert view (not just raw polling) sees a wider floor for Ricketts than for Marshall. https://ballotpedia.org/United_States_Senate_election_in_Nebraska,_2026 - [2026-10-08] Pollsmax's model-based forecast (distinct from pure polling average) projects nearly identical Republican margins for the two races — Nebraska R+4.5 vs. Kansas R+4.8 — meaning even aggregator "fundamentals-adjusted" projections do not clearly separate the two, undercutting any confident claim that Kansas will out-pace Nebraska. https://www.pollsmax.com/senate/nebraska/forecast/ - [2026-10-09] A same-week Kansas tracker (FiftyPlusOne) shows Hamilton actually ahead, 46.5% to 45.1% (Hamilton +1), the newest data point in the race, indicating Kansas's margin could resolve near zero or even flip to a Democratic win — in which case Kansas's margin-of-victory (measured as an absolute value) could still be smaller than whatever margin survives in Nebraska. https://fiftyplusone.news/polls/senate/general/kansas - [2026-10-07] Ballotpedia's FEC-sourced finance table for Nebraska shows Ricketts entering the race with far larger resources (Ricketts $3.6M raised/$567K cash vs. Osborn-aligned filings far smaller as of Dec 2025), and other reporting put Ricketts's mid-2026 cash on hand at $6.9M against Osborn's $2.4M, giving the Republican incumbent a financial cushion to consolidate late undecideds and potentially widen his margin in the final weeks. https://ballotpedia.org/United_States_Senate_election_in_Nebraska,_2026 ; https://politalking.us/nebraska-senate-2026-ricketts-vs-independent-osborn/ - [2026-10-06] PoliAgg's Kansas model, despite showing a literal 0.0-point polling margin, still forecasts a final margin of R+13.9 (80% CI R+3.6 to R+24.1), illustrating that fundamentals-based models expect significant reversion toward the historical Republican baseline in Kansas; if that reversion is incomplete while Nebraska's Republican-leaning fundamentals (R+10 PVI, 94-year-plus streak of GOP Senate wins, 2024 Ricketts special-election win by 25 points) hold, Nebraska's realized margin could still match or exceed Kansas's. https://poliagg.com/race/us-senate-2026-ks/ - [2026-09-30] Nebraska's state and district-level fundamentals remain more Republican than Kansas's: Nebraska's three House districts carry PVIs of R+6, D+3, and R+27 (statewide R+10), and the state backed Trump by a wide margin in 2024, giving Ricketts a larger structural floor than Marshall even in a bad GOP environment. https://ballotpedia.org/United_States_Senate_election_in_Nebraska,_2026 - [2026-10-07] Politalking's roundup notes Trump is planning to campaign in Nebraska for Ricketts amid the close race, a late-cycle mobilization tool unmatched so far by any similar high-profile intervention for Marshall in Kansas, which could push Nebraska's final margin up relative to Kansas's. https://politalking.us/nebraska-senate-2026-ricketts-vs-independent-osborn/ - [2026-09-16] A Wedgewood Polls survey had Ricketts leading Osborn 52%-48% (R+4) in mid-September, and even Nebraska's closest recent public poll (SurveyUSA, Sept 8-13, Osborn +4) is matched by equally wide swings in Kansas (Marshall +5 co/efficient, Hamilton +3 YouGov), so neither state shows a consistently larger spread — the comparison remains genuinely contestable rather than Kansas-favored. https://politicalwire.com/2026/09/16/ricketts-leads-osborn-in-nebraska-senate-race/ BOTTOM LINE: The strongest NO case rests on the fact that every major nonpartisan handicapper (Cook, Inside Elections, Sabato, DDHQ) still rates Nebraska a tier safer for Republicans ("Likely R") than Kansas ("Toss Up"), Nebraska's underlying partisan fundamentals (PVI R+10, deep GOP Senate history) and financial/campaign-mobilization edges for Ricketts remain stronger than Marshall's in Kansas, and a same-week Kansas poll (Oct 9) shows Hamilton leading — all suggesting Nebraska's eventual margin could plausibly equal or exceed Kansas's, keeping the "Kansas largest margin" outcome far from assured. NOT FOUND: No post-October-8 Nebraska poll or any early/absentee turnout data for either state; no official FEC Q3 2026 (July-September) campaign-finance filings for Marshall, Hamilton, Ricketts, or Osborn were located to confirm current cash-on-hand gaps.