{
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  "record_id": "CMSIG2026102005",
  "record_slug": "gop-holds-one-chamber-after-midterms-kalshi-65-2026-10-20",
  "schema_version": "v0.2.0",
  "provenance_version": "0.2.0",
  "published_at": "2026-10-20T20:00:00.000Z",
  "semantic_title": "Republicans retaining at least one chamber stays above 50%",
  "telemetry": "Kalshi 65%",
  "headline": "GOP holds one chamber after midterms: Kalshi 65%",
  "category_tag": "MOMENTUM_REPRICING",
  "secondary_tags": [],
  "detection_path": "news_cycle",
  "pre_news_classification": "concurrent",
  "status": {
    "state": "live",
    "as_of": "2026-10-21",
    "outcome": null,
    "outcome_basis": null,
    "final_price": null,
    "resolved_at": null
  },
  "target_event_id": "CM-EVT-T5VXKJT451",
  "target_event_slug": "kxbalancepowercombo-27feb",
  "event_question": "Will Republicans control at least one chamber of Congress after the 2026 midterm elections?",
  "linked_event_ids": [],
  "primary_market": {
    "platform": "kalshi",
    "platform_market_id": "KXBALANCEPOWERCOMBO-27FEB-DD",
    "question_raw": "Will House Control be Democratic AND Senate Control be Democratic for Feb 2027?",
    "current_price": 0.65,
    "volume_24h_usd": 146874.65,
    "arbitration_model": "kalshi_staff",
    "resolution_source": "Bureau of Labor Statistics",
    "resolves_at": "2027-02-01T15:00:00Z"
  },
  "related_markets": [],
  "bullets": [
    "Kalshi puts 65% odds on Republicans controlling at least one chamber of Congress after the 2026 midterms, resolved via Bureau of Labor Statistics.",
    "Despite Trump's 33% approval rating and polling that shows a potential Democratic wave, the Kalshi contract still favors Republicans holding at least one chamber.",
    "The companion Kalshi contract on the Democratic Party winning the House (CM-EVT-FV8MR86S63) sits at 91%, implying the market sees the House as likely flipping while the Senate remains competitive.",
    "Resolution requires official congressional composition data post-election; the 65% vs 91% House-flip gap suggests the Senate is where market consensus sees Republican survival most likely."
  ],
  "atomic_claims": [
    {
      "type": "news_event",
      "field_provenance": {
        "story": {
          "tier": "mediated",
          "method": "exa_search",
          "source": "Joseph Stepansky",
          "source_url": "https://www.aljazeera.com/news/2026/10/20/why-do-the-us-midterms-matter-for-trump-and-congress",
          "retrieved_at": "2026-10-21T07:48:07+00:00"
        }
      },
      "significance": {
        "threshold": 5,
        "threshold_unit": "rank",
        "passed": true,
        "reason": "surfaced in the daily Exa news-cycle scan; mechanically matched to an active kalshi market"
      },
      "story": "Republicans and Democrats are battling for control of Congress two weeks before the 2026 midterms, with Trump's approval at a record low 33% and Democrats rising in midterm polling.",
      "publisher": "Joseph Stepansky",
      "published_at": "2026-10-20T20:00:00.000Z",
      "source_url": "https://www.aljazeera.com/news/2026/10/20/why-do-the-us-midterms-matter-for-trump-and-congress"
    },
    {
      "type": "pm_response",
      "field_provenance": {
        "notes": {
          "tier": "editorial",
          "method": "llm_judge_cm_signal_v1"
        }
      },
      "notes": "Kalshi at 65% for GOP holding one chamber, alongside 91% for a Democratic House flip, implies the Senate is the market's designated Republican firewall going into election day."
    }
  ],
  "sources": [
    {
      "label": "Joseph Stepansky: Why do the US midterms matter for Trump and Congress?",
      "url": "https://www.aljazeera.com/news/2026/10/20/why-do-the-us-midterms-matter-for-trump-and-congress",
      "published_at": "2026-10-20T20:00:00.000Z",
      "retrieved_at": "2026-10-21T07:48:07+00:00"
    }
  ],
  "field_provenance": {
    "pm_data": "kalshi_api",
    "news_context": "exa_search",
    "editorial_judgment": "cm_signal_llm_judge"
  },
  "canonical_urls": {
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    "json": "https://clearmarket.fyi/signals/gop-holds-one-chamber-after-midterms-kalshi-65-2026-10-20.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)."
  },
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}