Democrats sweep four core Senate races stays near 50%
- Polymarket prices 55% on Democrats winning all four core Senate races, a slim majority-leaning read with no decisive lean.
- Poll data showing Democratic momentum in Republican-leaning districts is broadly consistent with the near-50% pricing, not a clear market mismatch.
- Kalshi's companion contract on the same sweep question sits at 53%, showing tight cross-venue alignment and little arbitrage gap.
- Resolution requires Democrats to win all four races; a single loss collapses the contract to zero, which explains the discount from a straight single-race favorite read.
- story
- A new midterm poll suggests Democrats may be making inroads in traditional Republican strongholds ahead of the November 3 elections.exa_search → Muskan Singh · as_of 2026-10-04T07:47:36+00:00 [mediated]
- publisher
- Muskan Singh
- published_at
- 2026-10-03T00:00:00.000Z
- interp
- Polymarket at 55% and Kalshi at 53% are in close agreement, reflecting genuine uncertainty rather than a consensus directional call on the Senate sweep.llm_judge_cm_signal_v1 [editorial]
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_v1github · auditable- match_method
entity_slug_match (mechanical)
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.
- venue_a
- polymarket · 0x096f26b2abcfde3ee7863e7916ca17682522715f7631debd4878a43ee6c797a9
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-four-core-senate-races-polymarket-55-2026-10-03/ |
| JSON | REST API for developers | https://clearmarket.fyi/signals/dems-sweep-four-core-senate-races-polymarket-55-2026-10-03.json |
| MCP | agentic AI tool call (Claude Desktop, Cursor, Continue) | clearmarket.get_signal("dems-sweep-four-core-senate-races-polymarket-55-2026-10-03") |
| 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": "CMSIG2026100302",
"published_at": "2026-10-03T00:00:00.000Z",
"detection": "news_cycle",
"category_tag": "MOMENTUM_REPRICING",
"secondary_tags": [],
"pre_news_classification": "concurrent",
"target_event_id": "CM-EVT-P54SDG6NP7",
"target_event_slug": "will-democrats-win-all-core-four-senate-races",
"event_question": "Will Democrats win all four core Senate races?",
"bullets": [
"Polymarket prices 55% on Democrats winning all four core Senate races, a slim majority-leaning read with no decisive lean.",
"Poll data showing Democratic momentum in Republican-leaning districts is broadly consistent with the near-50% pricing, not a clear market mismatch.",
"Kalshi's companion contract on the same sweep question sits at 53%, showing tight cross-venue alignment and little arbitrage gap.",
"Resolution requires Democrats to win all four races; a single loss collapses the contract to zero, which explains the discount from a straight single-race favorite read."
],
"atomic_claims": [
{
"type": "news_event",
"field_provenance": {
"story": {
"tier": "mediated",
"method": "exa_search",
"source": "Muskan Singh",
"source_url": "https://economictimes.indiatimes.com/news/international/us/u-s-midterm-elections-2026-are-democrats-finally-making-a-comeback-in-republican-strongholds-heres-what-a-new-midterm-poll-shows/articleshow/134664760.cms",
"retrieved_at": "2026-10-04T07:47:36+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": "A new midterm poll suggests Democrats may be making inroads in traditional Republican strongholds ahead of the November 3 elections.",
"publisher": "Muskan Singh",
"published_at": "2026-10-03T00:00:00.000Z",
"source_url": "https://economictimes.indiatimes.com/news/international/us/u-s-midterm-elections-2026-are-democrats-finally-making-a-comeback-in-republican-strongholds-heres-what-a-new-midterm-poll-shows/articleshow/134664760.cms"
},
{
"type": "pm_response",
"field_provenance": {
"notes": {
"tier": "editorial",
"method": "llm_judge_cm_signal_v1"
}
},
"notes": "Polymarket at 55% and Kalshi at 53% are in close agreement, reflecting genuine uncertainty rather than a consensus directional call on the Senate sweep."
}
],
"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/will-democrats-win-all-core-four-senate-races/",
"related": []
},
"external": {
"venue_a": null,
"venue_b": null,
"benchmark": null
}
},
"sources": [
{
"label": "Muskan Singh: Midterm polls: U.S. midterm elections 2026: Are Democrats finally maki",
"url": "https://economictimes.indiatimes.com/news/international/us/u-s-midterm-elections-2026-are-democrats-finally-making-a-comeback-in-republican-strongholds-heres-what-a-new-midterm-poll-shows/articleshow/134664760.cms",
"published_at": "2026-10-03T00:00:00.000Z",
"retrieved_at": "2026-10-04T07:47:36+00:00"
}
],
"field_provenance": {
"pm_data": "polymarket_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