Which party will win control of the U.S. Senate in the 2026 election? [ resolved 2026-11-04 ]
Will the Democratic Party control the Senate after the 2026 Midterm elections?
polymarket: [C] multiple sources, no tie-break·reporting consensus methodology ›
distribution · by resolution date · marks: daily snapshot
polymarket 9 markets
| market | resolves | P(YES) | vol (24h) | vol (cum) | RCG | venue id | ||
|---|---|---|---|---|---|---|---|---|
| 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 | ||
| The Democratic Party | 2026-11-04 | 100.0% | $10K | $2.16M | C | 0x307a1e…38f3 | ||
| The Republican Party | 2026-11-04 | 0.0% | $6.7K | $1.52M | C | 0x86bfb5…2587 |
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 |
|---|---|---|---|---|
| YES | Will the Democratic Party control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-04 | 100% |
| NO | Will the Republican Party control the Senate after the 2026 Midterm elections? | polymarket | 2026-11-04 | 0% |
Resolution dates are the venue's settlement timestamps (2 resolved markets). Rows shown as "by [date]" carry the contract deadline: the venue no longer exposes a settlement time for them. PENDING upgrades to a final outcome on the next refresh.
recent wire items
- Markets put Republicans ahead in Senate race Polymarket 77%
- Polymarket prices Republican Senate control at 77% as polls open nationwide on Election Day.
- Democrats need four Senate flips; the Polymarket contract reflects the market views that path as unlikely but not impossible.
- The 23% implied probability for Democrats suggests the market sees a meaningful but uphill chance of a Senate flip.
- Cross-check: news coverage frames the race as a referendum on Trump, but the 77% Polymarket read puts Republicans firmly favored despite consumer sentiment at all-time lows.
- Democrats favored but not certain to take Senate control Polymarket 73%
- Polymarket prices Democrats winning Senate control at 73%, leaving meaningful 27% odds on Republicans retaining it.
- The Senate race is closer than the House call, and sector analysts in the story flag Senate composition as decisive for regulatory agendas.
- Kalshi's companion contract (CM-EVT-T5VXKJT451) at 74% on Republicans controlling at least one chamber captures the residual Republican Senate scenario.
- The four-seat Democratic gain threshold referenced in Story 24 maps to a contested landscape that the 73% Polymarket price reflects.
- Democrats favored to win Senate control after midterm vote Polymarket 78%
- Polymarket prices Democratic Senate control at 78%, making it a clear favorite heading into Election Day results.
- Voter economic discontent reported by Reuters and NYT polling is consistent with a Democratic lean, though the market is not pricing a certainty.
- Kalshi contract on Republicans controlling at least one chamber sits at 75%, implying markets assign meaningful probability to a split-chamber outcome.
- Resolution via Polymarket UMA oracle; delayed state certifications or runoffs could push final settlement well past Election Night.
- Senate control odds lean toward one party but stay near 75 percent Polymarket 73%
- 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.
- Republican Senate control stays favored heading into vote Polymarket 73%
- The Polymarket prediction market puts 73% odds on Republicans winning Senate control in the 2026 midterm elections.
- Multiple live coverage reports note Trump and Republican candidates are making a final push, consistent with a market that still assigns the GOP better-than-even Senate odds.
- The Kalshi contract on Republicans holding at least one chamber sits at 70%, broadly aligned with the Polymarket Senate reading.
- The Alaska Senate seat contract (CM-EVT-KQWMXB6NX7 at 28% for a new senator) suggests incumbency is holding; flipping that seat would marginally shift Senate control math.
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 2026-08-04. 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": 3679833,
"resolution_clarity_grade": "C",
"rcg_score": 50,
"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"
}
}
}