Senate control odds lean toward one party but stay near 75 percent

{
  "$schema": "https://clearmarket.fyi/schema/signal/v1.json",
  "provenance_version": "0.2.0",
  "record_id": "CMSIG2026110106",
  "published_at": "2026-11-01T20:35:48.000Z",
  "detection": "news_cycle",
  "category_tag": "PRE_EVENT_PRICING",
  "secondary_tags": [],
  "pre_news_classification": "pre_news",
  "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?",
  "bullets": [
    "Polymarket prices Senate control for one party at 73%, reflecting genuine uncertainty as Trump campaigns for vulnerable seats.",
    "The Michigan Senate race (Rogers vs. El-Sayed) is described as tight in news coverage; the Kalshi contract (CM-EVT-5BB4SFW2V1) puts 77% on Michigan electing a governor and senator from the same party, suggesting market alignment with Democratic strength.",
    "The companion Democrats-win-all-four-core-Senate-races Polymarket contract (CM-EVT-P54SDG6NP7) at 69% implies Democrats are favored in the core contested set, even as overall Senate control remains uncertain.",
    "Polymarket resolves via uma_oracle after official results; last-minute candidate crossovers (Michigan Democrat Haley Stevens endorsed Republican Mike Rogers per news) add resolution risk if results are contested."
  ],
  "atomic_claims": [
    {
      "type": "news_event",
      "field_provenance": {
        "story": {
          "tier": "mediated",
          "method": "exa_search",
          "source": "Elissa Fitzgerald",
          "source_url": "https://www.abc.net.au/news/2026-11-02/us-midterms-daily-news-briefing-trump-alaska-michigan/107326672",
          "retrieved_at": "2026-11-02T07:48:26+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": "Trump is rallying for embattled Senate seats in the final days before the midterms, with Senate control hanging on a handful of competitive races.",
      "publisher": "Elissa Fitzgerald",
      "published_at": "2026-11-01T20:35:48.000Z",
      "source_url": "https://www.abc.net.au/news/2026-11-02/us-midterms-daily-news-briefing-trump-alaska-michigan/107326672"
    },
    {
      "type": "pm_response",
      "field_provenance": {
        "notes": {
          "tier": "editorial",
          "method": "llm_judge_cm_signal_v1"
        }
      },
      "notes": "Polymarket contract resolves via uma_oracle; the 73% reading reflects a Senate outcome that remains meaningfully contested even as House odds are far more settled."
    }
  ],
  "evaluation": {
    "judge_engine": "none — deterministic news-cycle scan",
    "judge_verdict": "auto_published",
    "judge_confidence": null,
    "prompt_template": "news_cycle_v1"
  },
  "citations": {
    "internal": {
      "cm_event": "/events/which-party-will-win-the-senate-in-2026/",
      "related": []
    },
    "external": {
      "venue_a": null,
      "venue_b": null,
      "benchmark": null
    }
  },
  "sources": [
    {
      "label": "Elissa Fitzgerald: US midterms briefing: Trump rallies for embattled Senate seats after H",
      "url": "https://www.abc.net.au/news/2026-11-02/us-midterms-daily-news-briefing-trump-alaska-michigan/107326672",
      "published_at": "2026-11-01T20:35:48.000Z",
      "retrieved_at": "2026-11-02T07:48:26+00:00"
    }
  ],
  "field_provenance": {
    "pm_data": "polymarket_api",
    "news_context": "exa_search",
    "editorial_judgment": "cm_signal_llm_judge"
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}