Democrats sweeping four core Senate races sits near 50%

Name: Democrats sweeping four core Senate races sits near 50%
Creator: ClearMarket
Published: 2026-08-25T00:00:00.000Z
License: https://creativecommons.org/licenses/by/4.0/

Kalshi 55%

record: CMSIG2026082504 | category: momentum-repricing | target: CM-EVT-QH62PP4D92 | published: 2026-08-25

4-bullet brief | narrative

Kalshi prices a 55% chance Democrats sweep the four core Senate races, resolves via Bloomberg.
Canada trade war escalation in border-state Senate battlegrounds is consistent with the market tilting just above 50% toward a Democratic sweep.
The broader House majority market (CM-EVT-FV8MR86S63) at 84% on Kalshi shows higher Democratic confidence in the House than in the Senate sweep.
Resolves via Bloomberg's official call of the four designated Senate race outcomes after the November 2026 elections.

atomic briefs | structured for retrieval

[01] news_event

significance

surfaced in the daily Exa news-cycle scan; mechanically matched to an active kalshi market

story: Trump's escalating trade war with Canada is threatening Republican Senate candidates in border states, with control of the U.S. Senate potentially hinging on affected races.exa_search → The Associated Press · as_of 2026-08-27T18:46:25+00:00
publisher: The Associated Press
published_at: 2026-08-25T00:00:00.000Z
source_url: https://www.wndu.com/2026/08/25/trumps-trade-war-with-canada-could-rattle-economies-states-with-key-senate-races/

[02] pm_response

interp: Kalshi at 55% for a Senate sweep reflects genuine uncertainty; the gap to 84% House odds implies the Senate path is meaningfully harder for Democrats.llm_judge_cm_signal_v1

evaluation

News-cycle wires publish on coverage, not editorial selection — the day’s top stories matched to the prediction markets pricing them, so nothing is cherry-picked.

judge_engine: none — deterministic news-cycle scan
judge_verdict: auto_published
judge_confidence: n/a — no judge gate (deterministic publishing)
prompt_template: news_cycle_v1 github · auditable
match_method: entity_slug_match (mechanical)

citation graph

Every wire traces back to the ClearMarket event it is built on, and out to each venue’s own market page — so any figure here can be verified at its source.

internal

cm_event: /events/kxdemcorefoursenatesweep-26nov03/

external

venue_a: https://kalshi.com/markets/KXDEMCOREFOURSENATESWEEP-26NOV03

programmatic access · four surfaces, same payload

AI grounded search reads embedded JSON-LD in HTML. Developers query REST. Agentic AI clients (Claude Desktop, Cursor) call MCP tools. AI crawlers index via /llms.txt. Same canonical record at every surface.

HTML	browsers, AI grounded search, crawlers (contains embedded JSON-LD `@type: Dataset`)	`https://clearmarket.fyi/signals/dems-sweep-core-four-senate-races-by-2026-kalshi-55-2026-08-25/`
JSON	REST API for developers	`https://clearmarket.fyi/signals/dems-sweep-core-four-senate-races-by-2026-kalshi-55-2026-08-25.json`
MCP	agentic AI tool call (Claude Desktop, Cursor, Continue)	`clearmarket.get_signal("dems-sweep-core-four-senate-races-by-2026-kalshi-55-2026-08-25")`
AGENT	AI crawler discovery index	`/llms.txt`

 PM data: platform APIs (hourly refresh). News context: retrieved with source citations. Editorial judgment: LLM judge with prompt template versioned per wire type. Per-claim provenance inline above; full per-field provenance map at the JSON endpoint under field_provenance.
  raw JSON record · same payload returned by REST endpoint
 {
  "$schema": "https://clearmarket.fyi/schema/signal/v1.json",
  "provenance_version": "0.2.0",
  "record_id": "CMSIG2026082504",
  "published_at": "2026-08-25T00:00:00.000Z",
  "detection": "news_cycle",
  "category_tag": "MOMENTUM_REPRICING",
  "secondary_tags": [],
  "pre_news_classification": "concurrent",
  "target_event_id": "CM-EVT-QH62PP4D92",
  "target_event_slug": "kxdemcorefoursenatesweep-26nov03",
  "event_question": "Will Democrats sweep the core four Senate races by 2026?",
  "bullets": [
    "Kalshi prices a 55% chance Democrats sweep the four core Senate races, resolves via Bloomberg.",
    "Canada trade war escalation in border-state Senate battlegrounds is consistent with the market tilting just above 50% toward a Democratic sweep.",
    "The broader House majority market (CM-EVT-FV8MR86S63) at 84% on Kalshi shows higher Democratic confidence in the House than in the Senate sweep.",
    "Resolves via Bloomberg's official call of the four designated Senate race outcomes after the November 2026 elections."
  ],
  "atomic_claims": [
    {
      "type": "news_event",
      "field_provenance": {
        "story": {
          "tier": "mediated",
          "method": "exa_search",
          "source": "The Associated Press",
          "source_url": "https://www.wndu.com/2026/08/25/trumps-trade-war-with-canada-could-rattle-economies-states-with-key-senate-races/",
          "retrieved_at": "2026-08-27T18:46:25+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": "Trump's escalating trade war with Canada is threatening Republican Senate candidates in border states, with control of the U.S. Senate potentially hinging on affected races.",
      "publisher": "The Associated Press",
      "published_at": "2026-08-25T00:00:00.000Z",
      "source_url": "https://www.wndu.com/2026/08/25/trumps-trade-war-with-canada-could-rattle-economies-states-with-key-senate-races/"
    },
    {
      "type": "pm_response",
      "field_provenance": {
        "notes": {
          "tier": "editorial",
          "method": "llm_judge_cm_signal_v1"
        }
      },
      "notes": "Kalshi at 55% for a Senate sweep reflects genuine uncertainty; the gap to 84% House odds implies the Senate path is meaningfully harder for Democrats."
    }
  ],
  "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/kxdemcorefoursenatesweep-26nov03/",
      "related": []
    },
    "external": {
      "venue_a": "https://kalshi.com/markets/KXDEMCOREFOURSENATESWEEP-26NOV03",
      "venue_b": null,
      "benchmark": null
    }
  },
  "sources": [
    {
      "label": "The Associated Press: Trump’s trade war with Canada could rattle economies in states with ke",
      "url": "https://www.wndu.com/2026/08/25/trumps-trade-war-with-canada-could-rattle-economies-states-with-key-senate-races/",
      "published_at": "2026-08-25T00:00:00.000Z",
      "retrieved_at": "2026-08-27T18:46:25+00:00"
    }
  ],
  "field_provenance": {
    "pm_data": "kalshi_api",
    "news_context": "exa_search",
    "editorial_judgment": "cm_signal_llm_judge"
  }
}
 
   PROVENANCE PROTOCOL v0.2 · [direct] venue api · [mediated] grounded web fetch + source url · [derived] computed from listed inputs · [editorial] versioned llm judgment · full spec /schema/provenance/v1

record CMSIG2026082504 published 2026-08-25T00:00:00.000Z signature sha256-eec9f492949… ← underlying event all signals →