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US Midterms 2026
21JUN

Cook moves six seats, all one way

3 min read
17:53UTC

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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PoliticsDeveloping
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
Missouri and Secretary of State Denny Hoskins
Missouri and Secretary of State Denny Hoskins
Missouri and Hoskins, held in contempt by the state's own supreme court on 10 September for prematurely reverting to HB 1, filed against a pause of the 8th Circuit's order restoring the same 2025 map.
Richard von Glahn and People Not Politicians
Richard von Glahn and People Not Politicians
Von Glahn and People Not Politicians filed emergency application 26A388 on 22 September asking Justice Kavanaugh to pause the 8th Circuit's order restoring the 2025 map, days after Missouri mailed overseas ballots under the 2022 lines. A refusal to pause it would leave those ballots carrying the wrong districts.
Harmeet Dhillon, Justice Department
Harmeet Dhillon, Justice Department
Dhillon said the department will send about 1,000 election monitors to Nevada, Pennsylvania and Rhode Island in November, calling it "the biggest DOJ election observer effort in history" and citing "67 election-related indictments and convictions" against 13 under the Biden administration.
National Association for the Advancement of Colored People and co-plaintiffs
National Association for the Advancement of Colored People and co-plaintiffs
The NAACP and eight other groups sued DHS in Washington on 18 September to keep ICE away from polling places, citing federal statutes barring armed officers and troops at elections. The suit follows a released 2025 DHS email listing non-English-language voting jurisdictions beside a Justice Department prosecution checklist.
Cook Political Report
Cook Political Report
Cook wrote that "the amount of money national Republicans have dedicated to this race is a flashing red light for Democrats" when it moved New Hampshire from Lean Democrat to Toss Up on 15 September, citing the NRSC's $5.18m for Sununu. It is the one state where Republican spending and the rating move the same direction.
Democratic Senate strategists
Democratic Senate strategists
Strategists note the DSCC held a $37.6m cash lead over the NRSC's $18.7m at the end of August, after coordinating just $1.00m of spending itself. One reading holds the committee is banking that cash for the campaign's final weeks rather than matching Republican spending dollar-for-dollar in August.