Most voters are not paying much attention to the midterms yet. That will change fast after Labor Day.
Republicans won a narrow House majority in 2024, and Democrats need only a small net gain this November to take control. The current battlefield gives them plenty of opportunities. As of Aug. 13, the Cook Political Report rates 19 House races as Toss Ups. Fifteen of those seats are held by Republicans and just four by Democrats.
That does not mean Democrats are guaranteed to win the House. Republicans have pickup opportunities of their own, and redistricting has helped give the GOP more breathing room in other parts of the map. Cook still sees a path for Republicans to hold the chamber, even while describing Democrats as favored overall.
But if the majority changes hands, these 15 Republican-held Toss Ups are likely to have a lot to do with it.
Arizona 1
Seat: Open, currently Republican
Republican: Jay Feely
Democrat: Amish Shah
Cook Rating: Toss Up
David Schweikert’s decision to leave the House and run for governor immediately turned Arizona’s 1st District into one of the best Democratic pickup opportunities in the country.
Republicans nominated former NFL kicker Jay Feely, while Democrats chose emergency physician and former state lawmaker Amish Shah. Shah ran for the seat in 2024 and lost to Schweikert. In an odd bit of history, Shah and Feely even overlapped with the New York Jets, Shah as a sideline doctor and Feely as a player.
The Scottsdale and northeast Phoenix district has become increasingly competitive, and Schweikert’s departure removes the advantage of a Republican incumbent who had repeatedly survived close races.
Arizona 6
Incumbent: Rep. Juan Ciscomani, Republican
Democrat: JoAnna Mendoza
Cook Rating: Toss Up
Juan Ciscomani has spent his congressional career representing one of the most competitive districts in Arizona. Southern Arizona has produced close races in consecutive cycles, and there is little reason to expect 2026 to be different.
Democrats are challenging him with Marine veteran JoAnna Mendoza. Ciscomani has already shown that he can survive in difficult territory, but Democrats need only a few Republican seats nationally, making AZ-06 an obvious place to spend money and resources.
California 22
Incumbent: Rep. David Valadao, Republican
Democrat: Randy Villegas
Cook Rating: Toss Up
David Valadao has made a career out of surviving in political territory that looks difficult for a Republican on paper.
He faces Democrat Randy Villegas in November in a Central Valley district Democrats have targeted repeatedly. Valadao’s personal brand and ability to outrun the Republican ticket have kept him in Congress through several difficult cycles.
The question this year is whether that advantage can hold in a midterm environment that currently looks more challenging for House Republicans.
Colorado 8
Incumbent: Rep. Gabe Evans, Republican
Democrat: Manny Rutinel
Cook Rating: Toss Up
Colorado’s 8th may be the purest swing district on this list.
Democrat Yadira Caraveo won the newly created seat in 2022 by just over 1,600 votes. Republican Gabe Evans flipped it two years later by fewer than 2,500. Democrat Manny Rutinel won his June primary with about 61 percent of the vote and now gets a shot at Evans.
The district runs from Democratic-leaning communities north of Denver into more conservative Weld County and has Colorado’s largest Hispanic population. Neither party has found a way to make it safe.
Iowa 1
Incumbent: Rep. Mariannette Miller-Meeks, Republican
Democrat: Christina Bohannan
Cook Rating: Toss Up
If this matchup looks familiar, it should.
Miller-Meeks and Bohannan are facing each other for the third consecutive election. Their 2024 race was decided by fewer than 1,000 votes, leaving Democrats convinced the seat remains within reach.
Iowa has moved sharply toward Republicans in presidential elections, but the 1st District continues to behave like a true battleground. If the national environment favors Democrats this fall, this will be one of the first races to watch.
Iowa 3
Incumbent: Rep. Zach Nunn, Republican
Democrat: Sarah Trone Garriott
Cook Rating: Toss Up
Zach Nunn represents the Des Moines-area 3rd District, another Iowa seat Republicans cannot take for granted.
Democrats nominated state Sen. Sarah Trone Garriott, who has experience winning competitive races of her own. Nunn has already proven capable of holding politically mixed territory, but this is exactly the kind of suburban district Democrats need if they want to build a House majority.
Michigan 7
Incumbent: Rep. Tom Barrett, Republican
Democrat: William Lawrence
Cook Rating: Toss Up
Michigan’s 7th became more interesting after the Aug. 4 Democratic primary.
Progressive climate activist William Lawrence defeated two more moderate rivals and will now face Republican Tom Barrett in November. Reuters described the district as a key battleground and noted that Lawrence’s victory set up one of the country’s closely watched House contests.
Barrett will argue that Lawrence is too far left for a swing district. Democrats will argue that an energized nominee can compete in territory that has bounced between the parties. Either way, national money will follow.
New Jersey 7
Incumbent: Rep. Tom Kean Jr., Republican
Democrat: Rebecca Bennett
Cook Rating: Toss Up
New Jersey’s 7th has been competitive for years, and 2026 brings another serious challenge for Tom Kean Jr.
Democrats nominated former Navy helicopter pilot Rebecca Bennett. Kean also enters the fall after a lengthy absence from Congress earlier this year while receiving treatment for depression, a period during which he missed a significant number of House votes.
The district’s suburban makeup and history of switching parties ensure that both sides will spend heavily here.
New York 17
Incumbent: Rep. Mike Lawler, Republican
Democrat: Cait Conley
Cook Rating: Toss Up
Mike Lawler may be one of the strongest Republican incumbents in one of the least comfortable Republican districts.
His Hudson Valley seat backed Kamala Harris in 2024, but Lawler still won reelection. This year he faces Army veteran Cait Conley, who outraised him in the second quarter, $1.7 million to $1.4 million, according to Axios. Lawler nevertheless maintained an advantage in polling cited by the outlet.
That makes NY-17 a useful test of candidate strength versus national environment. If Lawler loses, Republicans are probably having a difficult night elsewhere too.
Ohio 7
Incumbent: Rep. Max Miller, Republican
Democrat: Brian Poindexter
Cook Rating: Toss Up
Ohio’s 7th has changed more dramatically than almost any other race on this list.
Cook moved Max Miller from Likely Republican to Toss Up in August, making OH-07 one of the newest additions to the top tier of competitive seats.
Miller also faces abuse allegations from his ex-wife, allegations he has denied. He requested a House Ethics Committee investigation into the claims and has remained in the race. What once looked like a relatively comfortable Republican hold is now firmly on the national battlefield.
Pennsylvania 7
Incumbent: Rep. Ryan Mackenzie, Republican
Democrat: Bob Brooks
Cook Rating: Toss Up
Pennsylvania could play an outsized role in deciding the House majority, and the Lehigh Valley-based 7th District is one reason why.
Republican Ryan Mackenzie flipped the seat in 2024 by defeating Democratic Rep. Susan Wild. Democrats are trying to take it back with firefighter Bob Brooks.
Mackenzie now has the advantages of incumbency, but this district has remained close enough that neither party can assume much of anything.
Pennsylvania 8
Incumbent: Rep. Rob Bresnahan, Republican
Democrat: Paige Cognetti
Cook Rating: Toss Up
Rob Bresnahan defeated longtime Democratic Rep. Matt Cartwright in 2024, giving Republicans a major pickup in northeastern Pennsylvania.
Democrats are trying to reverse that result with Scranton Mayor Paige Cognetti. Cook moved PA-08 from Lean Republican to Toss Up earlier this year, citing both the broader political environment and race-specific developments.
The Scranton and Wilkes-Barre region has moved toward Republicans in presidential elections, but Democrats remain competitive down ballot. This race will show whether that Republican shift is becoming permanent.
Pennsylvania 10
Incumbent: Rep. Scott Perry, Republican
Democrat: Janelle Stelson
Cook Rating: Toss Up
This is one of the most obvious rematches of the cycle.
Former television anchor Janelle Stelson came within roughly 5,000 votes of defeating Scott Perry in 2024 and is back for another try. Perry, a former chairman of the House Freedom Caucus, remains one of the best-known conservatives in Congress.
The district is no longer the comfortable Republican seat it once was. A Stelson victory would not just be a major Democratic pickup. It would probably signal that the national environment had turned sharply against Republicans.
Virginia 2
Incumbent: Rep. Jen Kiggans, Republican
Democrat: Elaine Luria
Cook Rating: Toss Up
Virginia’s 2nd gives voters another rematch.
Jen Kiggans defeated Democratic Rep. Elaine Luria in 2022. Four years later, Luria is trying to win the Hampton Roads seat back.
Both candidates are Navy veterans, an especially important credential in a district centered around Virginia Beach and one of the country’s largest concentrations of military voters. Kiggans has already shown she can defeat Luria. The question is whether she can repeat that performance with a Republican president in the White House.
Wisconsin 3
Incumbent: Rep. Derrick Van Orden, Republican
Democrat: Rebecca Cooke
Cook Rating: Toss Up
Western Wisconsin will again feature Derrick Van Orden against Rebecca Cooke.
Cooke earned the Democratic nomination this month and will get a rematch after narrowly losing to Van Orden in 2024. The district has moved toward Republicans over time, but not far enough to remove it from the battlefield.
Wisconsin’s reputation for close elections makes WI-03 especially worth watching. If Democrats can flip working-class districts like this one, their path to the majority becomes much easier.
Why These 15 Matter
There are competitive Democratic-held seats too. Cook currently rates four of them as Toss Ups: Florida’s 25th, Ohio’s 9th, Texas’s 34th and Washington’s 3rd. Republicans can offset losses on this list by going on offense elsewhere.
Still, the imbalance is difficult to miss. Fifteen of Cook’s 19 Toss Ups are Republican-held.
That is the battlefield as summer winds down.
Some of these races will move before November. Others currently sitting in the Lean columns could become Toss Ups as campaigns spend more money, polling improves and voters begin paying attention. The national environment will matter, but so will individual candidates, local issues and mistakes that have not happened yet.
For now, these 15 seats offer the clearest look at where control of the House could be won or lost.
By November, a handful of them may decide who holds the speaker’s gavel in 2027.