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US Midterms 2026
1OCT

Cook moves six seats, all one way

3 min read
15:11UTC

Cook Political Report changed six House ratings on Thursday 3 September and moved every one toward the Democrats. Silver Bulletin's new FLIPR model, launched on Tuesday 11 August, then moved on a court order rather than a poll.

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Key takeaway

Cook shifted six House seats toward Democrats with no move in the other direction.

Cook Political Report published six House rating changes on Thursday 3 September and moved every one of them toward the Democrats.⁠1 Michigan's 10th and Florida's 14th went to Toss Up. Ohio's 15th and 10th and Colorado's 3rd fell from Solid Republican to Likely Republican, and Michigan's 8th rose from Lean Democratic to Likely Democratic. Nothing moved the other way. Cook rates every House district on a seven-point scale and revises in batches, so a batch with no counter-move is the part worth noticing.

Florida's 14th repays a second look. Kathy Castor is the sitting Democrat there, yet the seat was rated Lean Republican, because a rating describes the district and Florida's 24R-4D map pushed hers rightward. A long-serving Democrat in a Republican-leaning seat now sits in a toss-up. The batch follows a summer in which Sabato's Crystal Ball moved three governor's races in July and the president's approval reached the worst reading of either of his terms.

Silver Bulletin launched its 2026 forecast model on Tuesday 11 August. Forecast with Leading Indicators, Polls and Expert Ratings (FLIPR) runs 40,000 simulations per update and forecasts House, Senate and gubernatorial races jointly, so it can price a Republican Senate alongside a Democratic House rather than treating the two as separate bets.⁠2

Its numbers moved after the Missouri ruling. FLIPR's estimate of Democrats winning House control went from about 81 per cent to about 83, and its average simulated Democratic seat count from 230 to 231. Its estimate of Emanuel Cleaver holding Missouri's 5th District went from 25 per cent to 98.⁠3 A court order rather than an opinion shift produced that jump, so it says nothing about what voters think. Silver Bulletin publishes these as one model's outputs, not as a statement about what happens on 3 November.

Deep Analysis

In plain English

Two different ways of tracking which party is likely to win the House both moved toward the Democrats this week. Cook Political Report, which uses expert judgment, shifted six individual House races in the Democrats' favour and none the other way. Separately, a statistical model called FLIPR, which runs tens of thousands of simulations, jumped its Democratic control estimate from about 81 to 83 per cent, and its estimate that Missouri Congressman Emanuel Cleaver keeps his seat leapt from about 25 to 98 per cent after Missouri's court ruling on the map.

Deep Analysis
Root Causes

The scale of Cleaver's swing traces directly to Missouri's Supreme Court ruling suspending HB 1: the district's competitiveness depends entirely on which map is used, and a simulation model updates that input instantly, while a qualitative service like Cook adjusts ratings on its own review cycle.

That difference in update mechanism, not disagreement over direction, explains why the two outlets' reactions differ so much in size.

What could happen next?
  • Meaning

    Missouri's court ruling had an immediate, quantifiable effect on a single House race's national forecast, showing how much one state's redistricting fight can move overall control estimates.

  • Risk

    If Missouri's map fight reverses again, through the pending SCOTUS stay or the November referendum, FLIPR's Cleaver estimate has no fundamental basis to hold at 98 per cent.

Sources:Cook Political Report·Silver Bulletin·Silver Bulletin
Mentions:Nate Silver's Silver Bulletin →Missouri →Cook Political Report →Kathy Castor →Florida →Michigan →Pennsylvania →Sabato's Crystal Ball →Colorado →
First Reported In

Update #16 · Missouri suspends its map, and votes on it

Cook Political Report· 7 Sept 2026
Read original →
Causes and effects
Caused by
Missouri map suspended, sent to voters
The Missouri map suspension is what moved FLIPR's House and Missouri-5th estimates.
Occurred 3 Sept 2026
Read story →
Cook moves seven seats, none back
Cook's 3 September moves follow its own 18 June ratings round, extending the same series of Democratic-direction changes.
Occurred 18 Jun 2026
Read story →
This Event
Cook moves six seats, all one way
Six independently rated races shifted in one direction with nothing moving back, which is a stronger signal than any single survey.
Different Perspectives
Judge Mary Geiger Lewis, US District Court for the District of South Carolina
Judge Mary Geiger Lewis, US District Court for the District of South Carolina
Lewis dismissed on standing, without prejudice, the challenge by the South Carolina NAACP and three voters with disabilities to limits on who may help voters. The limits, including a cap of five voters per assistant, stand for the 3 November Senate election.
Judge Victoria Marie Calvert, US District Court for the Northern District of Georgia
Judge Victoria Marie Calvert, US District Court for the Northern District of Georgia
Calvert dismissed the Justice Department's suit for Georgia's unredacted voter list on 30 September, holding that the 1960 Civil Rights Act does not override state privacy law. Secretary of State Brad Raffensperger need not hand over birth dates, Social Security numbers or licence numbers.
Chad Bianco, Riverside County Sheriff
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Bianco, ordered by the state supreme court on 24 September to return about 650,000 Proposition 50 ballots, called his seizure a lawful investigation. He told CalMatters he would appeal to the federal courts.
Fairshake network, through Defend American Jobs
Fairshake network, through Defend American Jobs
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Texas PAC
Texas PAC
The super PAC reported $61.41 million of new spending on 30 September, its two largest lines opposing James Talarico and supporting Ken Paxton. Its race total of $131.53 million is the largest outside effort in any Senate contest this week, with donors undisclosed until 15 October.
Sabato's Crystal Ball
Sabato's Crystal Ball
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