Idaho Senate margin of victory
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Idaho Senate margin of victory
$0.00
1
11
AI Analysis
Trader mode: Actionable analysis for identifying opportunities and edge
About This Event
On November 3, 2026 If the Republican Party wins the 2026 U.S. Senate election in Idaho by X percentage points or more, then the market resolves to Yes. The margin of victory shall be calculated as follows based on the margin type. For percentage points: the vote percentage received by the Republican Party minus the vote percentage received by the candidate/party/option that finishes immediately behind the Republican Party if the Republican Party wins, or the candidate/party that finishes first
Current Market Outlook
Kalshi traders are pricing a 72% probability that the Republican Senate candidate in Idaho will win by at least 19 percentage points in 2026. That is a strong bet. A 72% price means the market sees a double-digit blowout as the baseline expectation, not an outlier. Idaho is the most Republican state in the country by partisan lean. Trump won it by 30 points in 2020 and by 31 points in 2024. The last Democratic Senate candidate to crack 40% was in 2008. The current Republican incumbent, Jim Risch, is retiring, which opens the seat but does not change the state's fundamentals.
Key Factors Driving the Odds
The market is pricing this high for three concrete reasons. First, Idaho's electorate has shifted right even further since 2020. The state legislature has become more conservative, and Democratic registration has declined to about 13% of voters. Second, no serious Democratic challenger has emerged. The last Democrat to run a competitive statewide race was Paulette Jordan in 2018, and she lost by 18 points. Third, the national environment favors Republicans in 2026, with a Republican president in office and a Senate map that already tilts red. The 19-point threshold is not arbitrary. It matches the average Republican margin in Idaho Senate races since 2010.
What Could Change These Odds
A major upset would require a Democratic candidate who can self-fund or a scandal involving the Republican nominee. Neither scenario is currently visible. The primary election in May 2026 will clarify the Republican field. If a fringe candidate wins the nomination, the margin could shrink. But Idaho Republicans have a history of nominating mainstream conservatives. The general election is November 3, 2026. If national polling shifts dramatically against Republicans, the 19-point line could become vulnerable. But the market is not pricing that risk. It is betting on a safe Republican hold.
Cross-Platform Analysis
This market trades only on Kalshi. There is no Polymarket equivalent. That limits arbitrage opportunities but also means the price reflects a single liquidity pool. Kalshi's user base tends to be smaller and more retail-focused than Polymarket's, which can lead to slower price discovery. If a similar market opened on Polymarket, the price might differ by 5-10 points due to different trader demographics. But as of now, Kalshi is the only game in town for this specific question.
AI-generated analysis based on market data. Not financial advice.
Overview
This prediction market concerns the margin of victory for the Republican Party in the 2026 U.S. Senate election in Idaho. The election is scheduled for November 3, 2026. The market will resolve to 'Yes' if the Republican candidate wins by a margin of X percentage points or more. The margin is calculated as the Republican candidate's vote share minus the vote share of the candidate who finishes second. Idaho's Senate seat is currently held by Republican Jim Risch, who is not seeking re-election in 2026. The race is expected to be a safe Republican hold, but the margin of victory is the key variable of interest. Idaho has a strong Republican lean, having voted for Donald Trump by over 30 points in both 2016 and 2020. The state has not elected a Democrat to the U.S. Senate since Frank Church in 1974. The primary election, likely in May 2026, will determine the Republican nominee, who will be the heavy favorite in the general election. The margin of victory could be influenced by candidate quality, national political trends, and turnout dynamics. This market is of interest to political analysts, bettors, and researchers who follow electoral trends and want to quantify the degree of Republican dominance in Idaho.
Historical Context
Idaho's U.S. Senate elections have been dominated by Republicans for decades. The last Democrat to win a Senate race was Frank Church in 1974. Church served four terms before losing to Republican Steve Symms in 1980. Since then, Republicans have held both Senate seats continuously. The margins have been large. In 2022, Jim Risch won re-election with 60.7% of the vote against Democrat David Roth, a margin of 24.2 points. In 2020, Mike Crapo won with 62.6% against Democrat Paulette Jordan, a margin of 28.6 points. The 2016 election saw Risch win with 65.9% against Democrat Jerry Sturgill, a margin of 35.2 points. These margins reflect Idaho's strong Republican lean. The open seat in 2026 is rare; the last open Senate seat in Idaho was in 1998 when Mike Crapo won the seat vacated by Dirk Kempthorne. In that race, Crapo won with 69.5% against Democrat Bill Mauk. The state's population has grown, but political alignment has remained stable. The 2026 margin will depend on candidate quality and national environment. In 2010, a wave year for Republicans, the margin in Idaho's Senate race was 34.8 points. In 2018, a Democratic wave year, the margin was still 22.2 points for the Republican. The floor for Republican margins appears to be around 20 points in recent decades.
Why It Matters
The margin of victory in Idaho's Senate race is a barometer of Republican strength in a deeply red state. A very large margin (e.g., over 35 points) would signal that the Republican base is highly energized and that the party's message resonates strongly. A narrower margin (e.g., under 20 points) might indicate dissatisfaction with the Republican candidate or a strong Democratic turnout. This matters for national political strategy. The margin provides data on voter behavior in safe states, which can inform resource allocation for both parties. For example, if the margin shrinks, Democrats might invest more in Idaho in future cycles. If it expands, Republicans might feel confident in their base. The race also affects Idaho's political landscape. A large victory could give the winner a strong mandate, influencing state policy and national influence. The margin could impact down-ballot races, affecting state legislature and local contests. For prediction markets, this topic allows traders to express views on electoral trends beyond just who wins. The outcome is a continuous variable, offering more granular insights than binary win/loss markets. Researchers use such margins to study partisan polarization, candidate effects, and turnout models.
Current Status
As of early 2025, the 2026 Idaho Senate race is an open seat with no declared candidates. Jim Risch's retirement has set off speculation about potential Republican candidates. Governor Brad Little and Attorney General Raúl Labrador are the most frequently mentioned names. Both have strong conservative credentials. On the Democratic side, no major candidates have emerged. The Idaho Democratic Party is rebuilding after a series of losses. The primary election is expected in May 2026. The Republican primary will be the decisive contest, as the general election is heavily tilted toward the GOP. National political conditions in 2026, including the midterm environment and presidential approval ratings, will influence turnout and margins. The market will be active as candidates declare and polling becomes available.
Frequently Asked Questions
What is the margin of victory in Idaho's Senate elections historically?
Historically, Republican margins in Idaho Senate races range from 20 to 35 percentage points. In 2022, Jim Risch won by 24.2 points. In 2016, he won by 35.2 points. The average margin since 2000 is about 28 points.
Who are the potential candidates for the 2026 Idaho Senate race?
Potential Republican candidates include Governor Brad Little, Attorney General Raúl Labrador, and Idaho GOP Chair Dorothy Moon. No Democratic candidates have declared yet. The primary will likely be in May 2026.
How does Idaho's partisan lean affect the Senate margin?
Idaho is a heavily Republican state with a PVI of R+18. This means the Republican candidate starts with a large advantage. The margin is affected by candidate quality and national trends, but the floor is around 20 points.
What factors could narrow the Republican margin in 2026?
A strong Democratic candidate, a controversial Republican nominee, or a national environment favoring Democrats (e.g., a wave year) could narrow the margin. Low Republican turnout or a primary that divides the party could also reduce the margin.
What factors could widen the Republican margin in 2026?
A popular Republican candidate, a weak Democratic opponent, or a national environment favoring Republicans could widen the margin. High Republican turnout, especially in a presidential midterm year, could also increase the margin.
How is the margin of victory calculated for this market?
The margin is the Republican candidate's vote percentage minus the vote percentage of the second-place finisher. For example, if the Republican gets 62% and the Democrat gets 35%, the margin is 27 points. The market resolves to Yes if this margin meets or exceeds the specified threshold.
Educational content is AI-generated and sourced from Wikipedia. It should not be considered financial advice.
