GOP's worst Great Plains Senate Race (IA, NE, KS)?
4.0 pts (24h)PoliticsOne-OffUS PoliticsElection13d
PolymarketCheck availabilityNo KYCVerified resolution dataWell calibratedSelected book midpoint
Iowa · —
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Stored reference
Iowa 50.5%Leader of 3 outcomes
Iowa 50.5%Market quality
74 / 100
Medium quality24h Volume
$285.2
Liquidity
$65.9K
High liquidityOpen interest
$879.2
Bid / Ask
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IowaSpread
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Comments
0
7d Change
-10.0 pts
Market data
Updated 8 minutes ago
Sep 17, 26, 5:23 PM UTCNov 3, 26, 11:59 PM UTC
Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Polymarket
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Minimum order (shares):
- 5
- Tick size:
- 1 percentage points
- Fees:
- Yes
Top holders
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Market depth · Iowa
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Related questions for context, not a comparison of equivalent contracts.
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Manifold MarketsRules
The 2026 midterm elections are scheduled to be held on November 3, 2026.
- This market will resolve according to the state, out of those listed, in which the Republican Senate candidate earns the lowest vote share percentage in the midterm election.
- Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election.
- For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Republican, and only non-exhausted ballots will be considered to be valid in that round.
- In the event that such a round contains multiple Republicans, the relevant vote share will be that of the Republican with the higher vote share.
- If two vote shares are identical, this market will rank the tied states in alphabetical order.