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2026 primary season closes with record congressional turnover

2026 primary season closes with record congressional turnover

Rule Changes

Record retirements and primary defeats leave nearly 100 seats with new members

Today: Primary season closes with record departures

Overview

Updated 1 hour ago

Nearly one in five lawmakers who started the 119th Congress won't return next year. The 2026 primary season closed with 99 seats guaranteed to have a different member than when the Congress began in January 2025.

The turnover comes from record retirements, primary defeats, and mid-decade redistricting. Texas alone will send at least 13 new representatives to Washington, the most of any state. Louisiana's House primaries, delayed until November 3, could add more.

Why it matters

Control of the House could hinge on a few races, and record turnover means the next Congress will look very different.

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Key Indicators

99
Seats guaranteed to change hands
83 House seats and 16 Senate seats will have a different member than at the start of the 119th Congress.
13
Incumbents defeated in primaries
Two senators and 11 House members lost their party's nomination, the second-highest House total since 2014.
60
House members retiring or seeking other office
Includes members running for Senate, governor, and other positions. Only 13 of 28 House members seeking other offices won their primaries.
13
Senators retiring or seeking other office
Two additional senators, Amy Klobuchar and Marsha Blackburn, are expected to resign if they win their gubernatorial races.

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Timeline

March 2026 September 2026

8 events Latest: Today
Tap a bar to jump to that date
  1. Primary season closes with record departures

    Today Analysis

    NPR, Pew, and Brookings publish analyses showing 99 seats guaranteed to change hands, the highest pre-election turnover in over three decades.

  2. Larson and Mills lose in August primaries

    Election

    Connecticut's John Larson loses to a younger challenger. Florida's Cory Mills, facing a House Ethics Committee probe, is also defeated.

  3. Michigan primary unseats Thanedar

    Election

    Progressive challenger Donavan McKinney defeats Shri Thanedar in Michigan's August 4 primary.

  4. DeGette loses Colorado primary

    Election

    Diana DeGette, who served nearly three decades, loses to Melat Kiros, a democratic socialist born the year DeGette first took office.

  5. New York primary ousts Espaillat and Goldman

    Election

    Adriano Espaillat, chair of the Congressional Hispanic Caucus, and Dan Goldman lose to candidates endorsed by New York Mayor Zohran Mamdani.

  6. Massie loses Kentucky primary

    Election

    Thomas Massie, a libertarian-leaning Republican, loses to Trump-backed challenger Ed Gallrein days after Cassidy's defeat.

  7. Cassidy loses Louisiana Senate primary

    Election

    Bill Cassidy loses to Trump-backed Julia Letlow, who wins the runoff. Cassidy had voted to convict Trump in his second impeachment trial.

  8. Texas primary: Crenshaw first incumbent to fall

    Election

    Dan Crenshaw becomes the first incumbent defeated in the 2026 primary season. Four other Texas incumbents face runoffs.

Scenarios

1

Democrats win the House majority

Possible Resolves by Nov 4, 2026

Discussed by: CNN, Pew Research Center

If Democrats win the 218 seats needed for a majority, the turnover works in their favor. Republicans netted as many as nine favorable seats through redistricting, but a strong Democratic year could overcome that. The wave of progressive challengers who ousted incumbents in primaries would take office, shifting the Democratic caucus to the left.

2

Republicans hold the House majority

Likely Resolves by Nov 4, 2026

Discussed by: CNN, Brookings Institution

Republicans netted as many as nine favorable seats through mid-decade redistricting, which could be decisive in a close election. If they hold the majority, the turnover mostly replaces retiring incumbents with same-party newcomers. Trump-backed challengers who won primaries would join the caucus, potentially shifting it further toward the president's wing.

3

Louisiana primary adds more incumbent defeats

Possible Resolves by Nov 4, 2026

Discussed by: NPR, Ballotpedia

Louisiana's unique jungle primary on November 3 could produce more departures. The state's House primaries were delayed after congressional redistricting. If any Louisiana House incumbents lose, the total number of primary defeats would rise above the current 13.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

1992

1992 Congressional Turnover

65 House members and 9 senators did not seek reelection, the most in a single cycle since World War II. The election produced a net shift of just 9 seats from Democrat to Republican.

Then

Democrats kept the House despite the wave of departures.

Now

The wave of new members and anti-incumbent sentiment set up the 1994 Republican revolution that ended Democratic control.

Why this matters now

The 2026 cycle is the first since 1992 to see comparable turnover. The question is whether it produces a similar delayed wave in a future election.

1994

1994 Republican Revolution

86 incumbents left Congress, and Republicans gained 54 seats. The GOP took control of the House for the first time in 40 years.

Then

Newt Gingrich became Speaker and the 'Contract with America' set the Republican agenda.

Now

The 1994 election realigned American politics for a generation and showed that high turnover can produce sudden party shifts.

Why this matters now

Shows that turnover alone doesn't determine which party benefits. The 2026 midterm could produce a similar surprise if the political winds shift.

Sources

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