{
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  "record_id": "CMSIG2026102605",
  "record_slug": "dems-win-us-senate-polymarket-66-2026-10-26",
  "schema_version": "v0.2.0",
  "provenance_version": "0.2.0",
  "published_at": "2026-10-26T17:00:00.000Z",
  "semantic_title": "Democrats favored but short of lock on US Senate control in 2026",
  "telemetry": "Polymarket 66%",
  "headline": "Dems win US Senate: Polymarket 66%",
  "category_tag": "MOMENTUM_REPRICING",
  "secondary_tags": [],
  "detection_path": "news_cycle",
  "pre_news_classification": "concurrent",
  "status": {
    "state": "live",
    "as_of": "2026-10-27",
    "outcome": null,
    "outcome_basis": null,
    "final_price": null,
    "resolved_at": null
  },
  "target_event_id": "CM-EVT-M9WJY06T90",
  "target_event_slug": "which-party-will-win-the-senate-in-2026",
  "event_question": "Which party will win control of the U.S. Senate in the 2026 election?",
  "linked_event_ids": [],
  "primary_market": {
    "platform": "polymarket",
    "platform_market_id": "0x307a1ed89d60b61002dd5bbf00e1408c5ed2ab3fcdb056191ca7ef9bc34d38f3",
    "question_raw": "Will the Democratic Party control the Senate after the 2026 Midterm elections?",
    "current_price": 0.66,
    "volume_24h_usd": 93471.99000900002,
    "arbitration_model": "uma_oracle",
    "resolves_at": "2026-11-03T00:00:00Z"
  },
  "related_markets": [],
  "bullets": [
    "Polymarket prices Democratic Senate control at 66%, a meaningful lean but well short of the 90% the same venue-equivalent shows for the House.",
    "Al Jazeera analysis highlighting competitive Senate races is consistent with the market's incomplete pricing of a Democratic sweep.",
    "The 34% Republican retention probability in the Senate reflects genuine uncertainty in key state races like Texas (Paxton vs. Talarico) described in companion coverage.",
    "Resolution via UMA oracle on Polymarket; final seat certification, not election-night projections, settles the contract."
  ],
  "atomic_claims": [
    {
      "type": "news_event",
      "field_provenance": {
        "story": {
          "tier": "mediated",
          "method": "exa_search",
          "source": "Alia Chughtai, Hoda Sherif",
          "source_url": "https://www.aljazeera.com/news/2026/10/26/us-midterm-elections-2026-in-maps-and-charts",
          "retrieved_at": "2026-10-27T07:48:12+00:00"
        }
      },
      "significance": {
        "threshold": 5,
        "threshold_unit": "rank",
        "passed": true,
        "reason": "surfaced in the daily Exa news-cycle scan; mechanically matched to an active polymarket market"
      },
      "story": "Al Jazeera maps and charts show November 3 midterms will decide which party controls Congress for the second half of Trump's presidency.",
      "publisher": "Alia Chughtai, Hoda Sherif",
      "published_at": "2026-10-26T17:00:00.000Z",
      "source_url": "https://www.aljazeera.com/news/2026/10/26/us-midterm-elections-2026-in-maps-and-charts"
    },
    {
      "type": "pm_response",
      "field_provenance": {
        "notes": {
          "tier": "editorial",
          "method": "llm_judge_cm_signal_v1"
        }
      },
      "notes": "Polymarket's 66% on Democratic Senate control is the softest of the three chamber-control contracts, tracking the competitive map identified in Al Jazeera's midterm preview."
    }
  ],
  "sources": [
    {
      "label": "Alia Chughtai, Hoda Sherif: US midterm elections 2026 in maps and charts",
      "url": "https://www.aljazeera.com/news/2026/10/26/us-midterm-elections-2026-in-maps-and-charts",
      "published_at": "2026-10-26T17:00:00.000Z",
      "retrieved_at": "2026-10-27T07:48:12+00:00"
    }
  ],
  "field_provenance": {
    "pm_data": "polymarket_api",
    "news_context": "exa_search",
    "editorial_judgment": "cm_signal_llm_judge"
  },
  "canonical_urls": {
    "html": "https://clearmarket.fyi/signals/dems-win-us-senate-polymarket-66-2026-10-26/",
    "json": "https://clearmarket.fyi/signals/dems-win-us-senate-polymarket-66-2026-10-26.json"
  },
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "_provenance_registry": {
    "direct": "Unaltered extraction from primary venue/source API (e.g., polymarket_clob_api, kalshi_api, BLS, FRED). Highest trust tier.",
    "mediated": "Information fetched via grounded agentic retrieval (e.g., perplexity_grounded). MUST carry source_url to the underlying primary source.",
    "derived": "Algorithmic computation from listed inputs. Chain only as fresh as the oldest input timestamp (see as_of).",
    "editorial": "Interpretive classification produced by a versioned LLM prompt template (prompts auditable in github.com/JDSource/clearmarket/prompts)."
  },
  "_provenance_canonical": "https://clearmarket.fyi/schema/provenance/v1"
}