Index/Topics/2025 mid-decade redistricting wave

2025 mid-decade redistricting wave

The unusual wave of politically motivated mid-decade redistricting efforts in several states in 2025

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13 results
Jan 28, 2026
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What are the key dates in the 2026 midterm primary calendar for battleground states and how do they vary by state?

The is a patchwork: primaries begin as early as March and run through June with a second wave in August in some states, while stages its statewide primary on June 2 and ’s primary and potential runoff...

Jan 15, 2026
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how much can the us midterm elections change

The 2026 U.S. midterm elections can materially change who controls Congress, shift the legislative and oversight agenda for the remaining two years of President Trump’s term, and reshape state-level p...

Jan 28, 2026
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What Senate seats are most likely to determine control after the 2026 midterms?

The majority will likely be decided in a handful of competitive states rather than a broad national wave: , , , , and emerge repeatedly in trackers and strategy memos as the races most likely to tip c...

Jan 29, 2026

What is the Cook Partisan Voting Index and how is it calculated for 2025?

The Cook Partisan Voting Index () is a widely used metric that measures how strongly a congressional district or state leans Democratic or Republican relative to the national presidential vote; a labe...

Jan 22, 2026

Which House and Senate seats are most likely to decide impeachment-related control after the 2026 midterms?

The will put control of impeachment power squarely on a small slate of competitive House districts and a handful of Senate races: need a net gain of roughly three House seats to win the chamber and th...

Feb 6, 2026

How does the US census affect the number of electoral votes per state?

The decennial Census determines how the 435 seats in the are apportioned among the states, and because each state’s total equals its number of Representatives plus two Senators (with 3 additional elec...

Feb 5, 2026

How would canceling the 2026 midterms affect House of Representatives membership and terms?

would confront the basic two-year rhythm of House membership set by the Constitution and immediately freeze the current configuration of the chamber until some alternative is put in place, a prospect ...

Feb 5, 2026

Which specific special elections to the 119th Congress are scheduled for 2026 and what are their current partisan histories?

and two Senate special elections are scheduled in 2026 to fill seats vacated during the 119th Congress: three House seats tied to recent resignations or deaths (’s 18th, ’s 11th, ’s 14th) plus at leas...

Feb 5, 2026

Which specific House districts are most likely to flip in the 2026 midterms and why?

enter needing a tiny net gain—roughly three seats by some models—to reclaim the House, and the most vulnerable Republican-held districts are those , narrowly decided suburban and exurban seats such as...

Feb 5, 2026

Which political party has historically benefited most from gerrymandering in key states?

Across history both parties have drawn maps to their advantage, but in the modern era—especially after the redistricting cycle— secured the most consistent statewide and congressional seat advantages ...

Feb 4, 2026

Which 2025-26 special House elections have the narrowest margins and highest flip potential?

that produced the tightest margins and therefore the highest near‑term flip potential are concentrated where recent results showed major swings from 2024 baselines, where vacancies produced competitiv...

Feb 3, 2026

How does the Cook Partisan Voting Index classify each state and what does D+ or R+ mean?

The () rates every state and congressional district by how much more Democratic or Republican it voted in the last two -in-the-united-states">presidential elections compared with the national average;...

Jan 18, 2026

How would a postponed or cancelled midterm election affect the balance of power in Congress?

A postponed or cancelled U.S. midterm would be constitutionally fraught and politically seismic: the Constitution delegates election administration to the states but leaves a "residual and superseding...