Supreme Court Ruling Accelerates End of Competitive U.S. House Races Ahead of 2026 Midterms

The 2026 U.S. House midterm elections are poised to feature the fewest competitive districts in modern history, and the Supreme Court has now endorsed a redistricting strategy that will further diminish electoral competition.

Why it matters: With fewer competitive general elections, the decisive battles are increasingly shifting to party primaries—contests that often cater to a party’s most ideologically extreme voters rather than the broader electorate.

"It means that elections are just no longer really a barometer of how the public feels about politics."

— Robert Boatright, political science professor at Clark University, on the erosion of competitive elections

Expert Reactions: A Warning on the Future of Elections

Nick Troiano, executive director of the election reform group Unite America, told Axios that the 2026 midterms "will be the least competitive elections of our lifetime."

Troiano added, "Both parties are fighting fire with fire when it comes to gerrymandering—and the natural outcome is that the whole place burns down."

Supreme Court Ruling: Partisan Gerrymandering Now Protected

On Wednesday, the Supreme Court ruled that partisan gerrymandering can shield voting maps from legal challenges—even if those maps limit minority representation. In the majority opinion, Justice Samuel Alito wrote that the Voting Rights Act "does not intrude on States' prerogative to draw districts based on nonracial factors, including to achieve partisan advantage."

By the Numbers: A Steep Decline in Competitive Races

Current data from the nonpartisan Cook Political Report shows a dramatic drop in competitive House races:

• 16 of 435 House seats are labeled as "Toss Up" (down from 22 in 2024 and 36 in 2022).
• 14 seats lean toward Democrats, while 2 lean toward Republicans.
• In 2024, Cook labeled 22 seats as toss-ups, with 13 leaning Democratic and 8 leaning Republican.
• In 2022, there were 36 toss-ups and 28 leaners.

Unite America estimates that, months ahead of the midterms, upward of 400 House seats are already effectively "decided."

Redistricting’s Ripple Effect: Fewer Competitive November Races

Even if mid-year redistricting efforts balance out, the long-term trend is clear: fewer nail-biting general elections, says Dave Wasserman, senior editor at the Cook Political Report and a leading elections analyst.

Wasserman notes that today, a party gaining 20 seats in a wave election is the equivalent of winning 40 or 50 seats in past cycles. With general elections less competitive, primaries become the real battlegrounds—often forcing pragmatic incumbents to adopt more extreme positions to appeal to their party’s base.

"It puts more pragmatic incumbents in difficult positions, meaning they have to sell themselves to voters and primary audiences in ways that might not be comfortable."

— Dave Wasserman, Cook Political Report

Money in Primaries: The Rise of Special Interest Influence

In safe seats with packed primaries, well-funded interest groups gain outsized influence, warns Boatright:

"It often means that in a safe seat, voters are going to wind up with a candidate ... from their party, but they're not necessarily a candidate with broad support in the district, and they may be a candidate who is beholden to some special interest."

Voter Turnout at Risk: The Consequences of Uncompetitive Elections

Kareem Crayton, vice president of the Brennan Center’s Washington, D.C., office, argues that the lack of competition could suppress voter turnout. Historically, competitive elections drive higher participation rates.

To counter this trend, groups like Unite America advocate for primary reforms, such as the all-candidate systems used in Washington, California, and Alaska. Currently, 17 states still operate under closed or partially closed primary systems, according to the National Conference of State Legislatures.