{
  "_notice": {
    "type": "free_key_offer",
    "message": "Free and anonymous access is staying. If this endpoint is in your pipeline, a free key adds advance notice before any schema change or deprecation. POST /v1/keys {\"email\": \"you@firm.com\"} — nothing else required. Something broken or missing? hello@clearmarket.fyi reaches a human.",
    "docs": "https://clearmarket.fyi/for-data/",
    "policy": "This field is additive and its shape will not change."
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  "event_id": "CM-EVT-2X8487L8P4",
  "slug": "iowa-senate-election-winner",
  "question": "Will a Republican win the Iowa Senate seat in the next election?",
  "category": "politics",
  "event_type": "BINARY",
  "ladder_distribution": null,
  "tags": [
    "elections",
    "politics",
    "iowa",
    "us-senate",
    "2026"
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  "catalyst_types": [],
  "catalyst_dates": [],
  "editorial_notes": "These markets track the outcome of the 2026 Iowa U.S. Senate election. Polymarket structures the event across two layers: party-level contracts price Democratic or Republican victory, while candidate-level contracts price individual nominees. All thirteen contracts resolve via Polymarket's UMA Optimistic Oracle using the Associated Press call as the authoritative source. Candidate probabilities must sum to the party-level implied probability, providing an internal consistency check.",
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  "created_at": "2026-07-23T21:11:14.426158+00:00",
  "updated_at": "2026-07-23T21:11:14.426158+00:00",
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      "platform_market_id": "0xd50c016598c499fceea10a1a714e48d9b4953487fe215daeaf916068fae722f1",
      "question": "Will the Democrats win the Iowa Senate race in 2026?",
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      "contract_type": "binary",
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      "close_at": null,
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        "rules_raw": "This market will resolve according to the winner of the 2026 midterm Iowa U.S. Senate election, inclusive of any run-offs.\n\nA candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.\n\nCandidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.\n\nThe resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.",
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            "provenance": "clearmarket_editorial"
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        "caps": [],
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      "tags": [
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      "close_at": null,
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      "close_at": null,
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      "tags": [
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      "market_id": "CM-MKT-916RJWJZL6",
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      "question": "Will Person B win the Iowa Senate race in 2026?",
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      "close_at": null,
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        "rules_raw": "This market will resolve according to the winner of the 2026 midterm Iowa U.S. Senate election, inclusive of any run-offs.\n\nA candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.\n\nCandidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.\n\nThe resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.",
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      "question": "Will Person C win the Iowa Senate race in 2026?",
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      "close_at": null,
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      "question": "Will Person D win the Iowa Senate race in 2026?",
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      "close_at": null,
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      "resolution": {
        "rules_raw": "This market will resolve according to the winner of the 2026 midterm Iowa U.S. Senate election, inclusive of any run-offs.\n\nA candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.\n\nCandidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.\n\nThe resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.",
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      "question": "Will Person E win the Iowa Senate race in 2026?",
      "description": "This market will resolve according to the winner of the 2026 midterm Iowa U.S. Senate election, inclusive of any run-offs.\n\nA candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.\n\nCandidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.\n\nThe resolution source for this market is the Associated Press",
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      "close_at": null,
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      "resolution": {
        "rules_raw": "This market will resolve according to the winner of the 2026 midterm Iowa U.S. Senate election, inclusive of any run-offs.\n\nA candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.\n\nCandidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.\n\nThe resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.",
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