Which party will win control of the U.S. Senate in the 2026 election? [ resolves 2026-11-03 (120D) ]
polymarket: [C] multiple sources, no tie-break·reporting consensus methodology ›
distribution · by outcome · marks: daily snapshot
polymarket 9 markets
| market | resolves | P(YES) | vol (24h) | vol (cum) | RCG | venue id | ||
|---|---|---|---|---|---|---|---|---|
| The Republican Party | 2026-11-03 | 55.0% | $4.3K | $1.29M | C | 0x86bfb5…2587 | ||
| The Democratic Party | 2026-11-03 | 44.0% | $6.7K | $1.45M | C | 0x307a1e…38f3 | ||
| Party A | 2026-11-03 | 0.0% | — | — | C | 0x75e838…fcf2 | ||
| Party B | 2026-11-03 | 0.0% | — | — | C | 0x7ede7e…0871 | ||
| Party C | 2026-11-03 | 0.0% | — | — | C | 0x5e5c20…4f32 | ||
| Party D | 2026-11-03 | 0.0% | — | — | C | 0x8cb80b…afb8 | ||
| Party E | 2026-11-03 | 0.0% | — | — | C | 0x86567e…a21e | ||
| Party F | 2026-11-03 | 0.0% | — | — | C | 0xa797f7…57ee | ||
| Another party | 2026-11-03 | 0.0% | — | — | C | 0x9e856e…e6a5 |
resolution architecture
| venue | proposer | source | citation | arbitration | class | analyst notes |
|---|---|---|---|---|---|---|
| polymarket | Whitelisted Proposers | uncommitted | not provided | Optimistic Oracle (UMA) | Other | — |
verbatim rules
polymarket
This market will resolve according to the party that controls the Senate following the 2026 U.S. Senate elections scheduled for November 3, 2026.
Senate control is defined as having more than half of the voting Senate members, or half of the voting Senate members and the Vice Presidency.
If the outcome of this election is ambiguous given the above rules, this market will remain open until the Majority Leader of the US Senate is selected following the 2026 US general election, at which point it will resolve to the party the majority leader is affiliated with at the time of their election to that position. If the elected majority leader does not caucus with any listed party this market will resolve “Other”.
Determination of which party controls the Senate after the 2026 US Senate elections will be based on a consensus of credible reporting, or if there is ambiguity, final federal and/or state election authority certification or other final official determination of the 2026 election results.
platform source field
polymarket.resolutionSource → ∅ no committed source — see rules text above resolution history
| outcome | market | venue | resolved | final price |
|---|---|---|---|---|
| closed | Will Party A control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
| closed | Will Party B control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
| closed | Will Party C control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
| closed | Will Party D control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
| closed | Will Party E control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
| closed | Will Party F control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
| closed | Will another party control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-03 | — |
Derived from the platform price + resolution-date snapshot (7 resolved markets). PENDING upgrades to a final outcome on the next refresh.
recent wire items
- Senate control balance fractures toward Republican edge Polymarket 41%
- Polymarket prediction market prices 41% on Democrats winning Senate control in the 2026 midterms, implying 59% Republican.
- Removal of coordinated spending caps structurally advantages the party with greater donor infrastructure; the market already leans Republican before this ruling takes effect.
- A companion Polymarket contract prices 84% on Republicans retaining the House, suggesting markets see a unified GOP Congress as the base case.
- Resolves via Associated Press or equivalent authoritative election call following the November 2026 midterm results.
- Democratic Senate control in 2026 fractures near even odds at 47 percent Polymarket 47%
- Polymarket prices 47% on Democrats winning Senate control in the 2026 midterms, essentially a coin flip.
- Sabato shifting three races toward Democrats is consistent with the near-50% market pricing, reflecting genuine uncertainty rather than a clear directional lean.
- The Kalshi contract on Republicans controlling at least one chamber (CM-EVT-T5VXKJT451) sits at only 23%, implying the market leans toward Democrats sweeping both chambers.
- Resolves via UMA oracle; final certified Senate composition after November 2026 elections determines settlement.
- Senate control fractures toward a near-even split heading into midterms Polymarket 44%
- Polymarket prices Republican Senate control in 2026 at 44%, implying Democrats are slight favorites after three races shifted their way.
- The forecaster's move is consistent with the market sitting below 50% for Republicans, though the margin is narrow.
- Companion Polymarket contract on House Republican control sits at 83%, suggesting split-Congress scenarios are a live pricing concern.
- Resolves via UMA oracle based on official Senate composition after the November 2026 elections.
- Senate Democratic control in 2026 wavers just below coin-flip Polymarket 44%
- Polymarket prices Democratic control of the Senate after 2026 midterms at 44%, just below even despite favorable forecaster moves.
- The three-race shift toward Democrats described by the forecaster is not yet fully reflected; the market still prices Republicans as slight favorites.
- A companion Kalshi contract prices Democratic control of the House at 79%, suggesting markets see an asymmetric Democratic advantage in the lower chamber.
- Resolution is via uma_oracle using certified election results; forecaster upgrades do not directly move the resolution trigger.
programmatic access · four surfaces, same payload
One canonical record at every surface — embedded JSON-LD, REST, MCP, and /llms.txt.
| HTML | browsers, AI grounded search, crawlers (embedded JSON-LD @type: Dataset) | https://clearmarket.fyi/events/which-party-will-win-the-senate-in-2026/ |
| JSON | REST API for developers | https://api.clearmarket.fyi/v1/events/which-party-will-win-the-senate-in-2026 |
| MCP | agentic AI tool call (Claude Desktop, Cursor, Continue) | clearmarket.get_event("which-party-will-win-the-senate-in-2026") |
| AGENT | AI crawler discovery index | /llms.txt |
Snapshot 2026-07-06. Venue data via Kalshi + Polymarket APIs. Editorial fields (tags, editorial_notes) are ClearMarket-drafted with AI assistance under editorial review. Derived fields (venues_covered, resolution_clarity_grade, rcg_score) computed at serve time. Full per-field map in the JSON record under field_provenance.
raw JSON record · same payload returned by REST endpoint {
"event_id": "CM-EVT-M9WJY06T90",
"slug": "which-party-will-win-the-senate-in-2026",
"question": "Which party will win control of the U.S. Senate in the 2026 election?",
"category": "politics",
"tags": [
"politics",
"elections",
"congress",
"us-senate",
"2026-midterms",
"party-control"
],
"venues_covered": [
"polymarket"
],
"market_count": 9,
"cumulative_volume_usd": 2733756,
"resolution_clarity_grade": "C",
"rcg_score": 54,
"rcg_caps": [
"multi_source_no_conflict_rule",
"commitment_uncommitted_placeholder"
],
"resolution_source": null,
"resolution_source_url": null,
"source_status": "no_committed_source",
"source_of_record": null,
"resolution_source_list": null,
"arbitration_model": "uma_oracle",
"proposer_model": "managed_whitelist",
"field_provenance": {
"question": {
"source": "clearmarket_editorial"
},
"tags": {
"source": "clearmarket_editorial",
"ai_drafted": true
},
"resolution_clarity_grade": {
"source": "derived",
"method": "rcg_v2_7factor"
},
"venues_covered": {
"source": "derived"
}
}
}