Researchers found that 2020 redistricting tactics created safer districts and reduced competition

There were fewer competitive districts in 2022 than at any point since 1970

Analysts reported that the 2022 midterms featured the lowest share of competitive congressional districts since 1970, reflecting how modern redistricting has increasingly produced safe seats and reduced voter choice.

Independent redistricting commissions aim to take politics out of the map-drawing process

In several states, citizen or bipartisan panels draw congressional and legislative districts based on neutral criteria like population and geography. Learn more about how these commissions increase competitiveness in elections.

In 2025, Democratic-led states moved to counter with their own redistricting plans

In response to Republican mid-decade redistricting efforts, Democratic leaders in California, New York, Illinois, and Maryland signaled plans to revisit their own congressional maps.

Experts predict Republicans will gain seats from mid-decade redistricting in 2026

Analysts expect GOP-led states to net seats through mid-decade redistricting, while Democratic states face greater hurdles due to commissions and legal limits—tilting the likely outcome toward Republican gains in 2026.

How algorithmic redistricting works

Computational methods are convincing a number of judges that some state district maps are drawn illegally. Here's a simple overview of how it works.

Republicans launched a mid-decade redistricting push in 2025

Beginning in Texas, Republican-controlled legislatures in Missouri, Florida, Ohio, and North Carolina moved to redraw maps before 2030—an uncommon mid-decade effort aimed at securing additional congressional seats.

Track the unusual push for mid-decade redistricting across the US

The National Conference of State Legislatures maintains a live tracker showing where mid-decade congressional redistricting is underway, detailing which states are pursuing new maps, the legislative and constitutional methods being used, and how courts are responding as the 2026 elections approach.

Redistricting reshapes political boundaries, usually once a decade after the census

Every 10 years, states redraw congressional and legislative districts based on census data to ensure equal population. Legislatures usually control the process, though some states use independent commissions to curb partisan influence.

See the most oddly gerrymandered districts in the US

Based on input from redistricting experts and political scientists, this resource identifies and ranks the most extreme congressional gerrymanders of the 2020s, examining how map design, cracking, and packing reduce competition and distort representation across states.

Mid-decade redistricting is historically rare in modern US history

States have generally redrawn districts only once per decade following the census, with mid-decade redistricting occurring infrequently and usually prompted by court orders or unusual political circumstances.

Hear how gerrymandering is like 'Moneyball applied to politics'

In a 2016 interview, journalist David Daley explained how Republicans used data-driven targeting after the 2010 census to lock in durable advantages, comparing modern gerrymandering strategies to the analytics revolution in baseball.

Test your gerrymandering skills with this interactive game

This simulation demonstrates how packing and cracking alter election outcomes. See how shifting district lines can change representation—regardless of the overall makeup of the electorate.

A 2013 Supreme Court case weakened federal oversight of redistricting

In Shelby County v. Holder, the Supreme Court struck down the Voting Rights Act's preclearance formula, reducing federal oversight of voting laws—including redistricting—and allowing changes to take effect without prior approval.

Can courts end partisan gerrymandering?

This podcast explored whether courts can rein in partisan map-drawing, focusing on North Carolina's 2023 redistricting battle, the Moore v. Harper case, and the controversial "independent state legislature" theory.

Red and blue election maps are a modern media invention

The red–blue color scheme used on election night maps emerged in the 20th century as television networks adopted color graphics to make results easier to follow. The association of red with Republicans and blue with Democrats later became standardized.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

Cracking and packing are gerrymandering techniques. Cracking splits opposing voters across districts, diluting their power. Packing concentrates their votes into a few districts, wasting them in overwhelming majorities for one party.

As of 2022, Congress was more ideologically polarized than at any point in 50 years

Research from the Pew Research Center indicates that Democrat and Republican lawmakers have become more ideologically unified internally while moving further apart overall—with Republicans shifting to the right faster than Democrats have shifted to the left.

This American Life explored Ohio's gerrymandering battle

In 2022, Ohio lawmakers repeatedly drew congressional districts that the state Supreme Court ruled unconstitutional. This defiance violated a voter-approved reform intended to prohibit partisan gerrymandering.

Most US House seats stay with the same party for decades

An analysis by the Pew Research Center shows that since the 1920s, the vast majority of House districts have been consistently won by the same party, with only a small share regularly changing hands. This highlights the large advantage incumbents have in House elections.

Thousands of state voting changes have been federally blocked since the Voting Rights Act

Since 1965, federal oversight has blocked thousands of state-level voting changes—including redistricting plans—by requiring approval for measures that could affect minority representation, a process scaled back by the Supreme Court in 2013.

The census reshapes House representation every 10 years

Conducted once every 10 years, the US Census determines how House seats are reapportioned among the states. The 2020 results shifted representation as state population growth and decline altered the geographic balance of political power.

Research shows that termed-out lawmakers become less active

A University of Chicago and Stanford study found that state legislators barred from reelection sponsor fewer bills, serve on fewer committees, and skip more votes. The research suggests lawmakers are more productive when future elections remain possible.

Thomas Hofeller was the GOP strategist known as the 'master of gerrymandering'

Republican consultant Thomas Hofeller quietly shaped US politics for decades by engineering partisan maps nationwide. His files, released after his death, revealed strategies to maximize GOP advantage and diminish Democratic influence.

How partisan is your district?

The highly-respected Cook Political Report rates how partisan--and therefore, how safe--every district in the US is. Hover over your home district to see the score.

The 2020 and 2024 elections ranked among the highest-turnout contests in over a century

Voter turnout reached 66% in 2020—the highest since 1908—and 64% in 2024, tied for second-highest with 1960. In 2024, Trump benefited from higher turnout among his prior voters and new voters.

Nate Silver argues the Electoral College can reduce the impact of excess votes

In this article, Silver weighs the Electoral College's flaws—especially popular-vote inversions—against its advantages, arguing it can limit the effect of surplus votes in heavily one-sided states and encourage broader competition.

Critics say that the Electoral College is outdated and favors small states

This article argues that the Electoral College no longer reflects modern democratic norms, disproportionately advantages smaller states, and warrants broader reform and national debate. (Some readers may experience a paywall.)

Breaking down the House races

All 435 voting seats in the US House are up for election, but less than 10% of them are competitive. See a breakdown of the races and which way they are leaning here.

Striking demographic trends from 2022

This article lists the 15 most striking research findings by Pew Research Center in 2022. The topics highlighted represent a sample of the Center’s research, compiled through surveys. Findings examine public opinion around the biggest news events...

Supporters argue that the Electoral College strengthens federalism and election stability

Defenders of the Electoral College argue it preserves federalism, forces candidates to build broad national coalitions, magnifies victory margins to reduce recount disputes, and limits incentives for voter fraud by containing the impact of contested ballots within individual states.

States are constitutionally mandated to draw their own congressional districts

Under Article I, Section 4 of the US Constitution, state legislatures possess the authority to determine how congressional districts are drawn. However, Congress retains the power to alter these rules if it chooses to.

Some Watergate reforms may have fueled today's partisan, confrontational Congress

The newly elected officials after the Watergate scandal dismantled seniority norms, opened committee votes, and televised proceedings—efforts aimed at increasing transparency that, unintentionally, may have fueled the polarized and combative tone of today's Congress.

US school distrists have greatly consolidated since 1940

Consolidation significantly decreased the number of independent school districts from approximately 117,000 in 1940 to just over 13,000 today, mainly driven by efforts to boost efficiency and balance funding across communities.

Understanding why Republicans have challenged funding for the NSF

Lack of Congressional support in funding the National Science Foundation has often been justified by the party's interest in cutting federal deficits and reducing waste for seemingly frivolous research projects. However, an analysis of NSF grant data from 1992 to 2018 shows that awards were given to Democratic constituencies at disproportionately higher rates than to Republican ones, despite a lack of evidence of partisanship in proposal reviews. (Some readers may experience a paywall.)

An interactive map of race and ethnicity across the US

This map by CNN shows race and ethnicity across the United States. America is more diverse and has more people than ever before. According to the 2020 census, much of its growth is occurring in and around metropolitan areas. By plotting the US...

How demographics influence voter turnout and elections

This article breaks down demographic data to show what it means for American elections. According to the latest US Census, the US is growing increasingly diverse. As the population becomes more diverse, so does the electorate. Analyzing the...

A summary of the 2020 census

This summary of the 2020 census shows an aging America and wide racial gaps between generations. The information provides the national and geographic composition of the nation’s age and racial-ethnic makeup. New statistics for 2020 show that the...

Ranked-choice voting redistributes ballots until a candidate wins a majority

In ranked-choice voting, voters rank candidates in order of preference. If no one wins a majority, the lowest-ranked candidate is eliminated, and their votes are reassigned until a candidate surpasses 50%, avoiding separate runoff elections.

School integration is designed to improve student outcomes

This American Life follows a Missouri district’s court-ordered integration program that dramatically improved achievement gaps, revealing how desegregation remains an effective yet underused education reform.

Sharp partisan divides shape how Americans view immigration enforcement

A January 2026 survey shows large party gaps: Both sides broadly support recording arrests, but Democrats are much more likely than Republicans to support sharing officer locations and to oppose profiling, masked officers, and neighborhood-based enforcement.

Which Senate seats are up for election, and how they are leaning

There are 14 Democratic and 21 Republican Senate seats up for grabs. See the Cook Political Report's continuously updated estimates on how they're leaning.

Tracking where people moved in the US in 2022

The latest data from the US Postal Service's change of address request system shows a decline in migration in 2022. See where people are moving and where they are leaving with this data breakdown.

How political campaigns use your data

What do campaigns know about US voters, and how do they use that information to shape their strategies during elections? US political campaigns base their strategies and tactics on data collected from more than 200 million voting-age Americans. This visualization by Reuters breaks down how data firms create national databases of voter files, collecting information from a variety of sources to create detailed voter profiles and how political campaigns use that data.

Critics argue that term limits weaken democracy and legislative effectiveness

Opponents contend that term limits deprive voters of choice, remove experienced lawmakers, and shift power to lobbyists and unelected staff. They believe frequent turnover reduces institutional knowledge and undermines the effectiveness of legislatures.

Congress is passing fewer laws than in previous decades

A Reuters analysis shows that legislative output in the US Congress has declined as polarization deepens, bipartisan cooperation erodes, and lawmakers rely more on sprawling, must-pass spending bills rather than regular lawmaking.

The term 'gerrymander' dates back to a 1812 Boston dinner party

The term "gerrymandering" arose when Massachusetts Governor Elbridge Gerry approved a state senate map with a district so contorted it resembled a salamander. Critics dubbed it the "Gerry-mander," cementing the term for partisan map manipulation.

The Voting Rights Act reshaped federal protection of voting rights

Signed into law in 1965, the Voting Rights Act aimed to end racial discrimination in voting. This resource traces its creation and explains how later court rulings have weakened its enforcement power over time.

Supporters say term limits prevent entrenched power

Advocates argue that term limits stop politicians from becoming career insiders, make government more accountable, and ensure fresh ideas circulate. They believe regular turnover keeps officials closer to the public and less beholden to special interests.

Visualize every time Congress has mentioned the word 'democracy' since 1880, and why

This Pudding interactive analyzes every mention of "democracy" in the Congressional Record over 145 years, charting how the word shifted from a partisan label to a concept, and tracking when lawmakers warned the system itself was under threat.

The 2024 US presidential election was a breakthrough moment for prediction markets

Founded in 2018 by MIT graduates, Kalshi won a federal appeals court ruling in October 2024 that allowed it to offer election contracts in the US. When prediction markets predicted President Donald Trump's win (more accurately than most polls), prediction markets were thrust into the public eye.