In the final week of the 2026 midterm election, ad spending data suggests the core battle centers on the height of a potential Democratic wave in the House rather than an effort to stop one. An analysis indicates the final competitive House landscape encompasses 70 districts where both major parties are investing at least six figures per district into their final messaging.
This robust investment includes more than $10 million each in toss-up districts across Michigan, North Carolina, New York, and Florida, alongside seven-figure ad buys in deep-red communities in Tennessee, Oklahoma, and Arkansas. Parties are also funneling last-minute resources into districts where Republican gerrymandering efforts risk backfiring.
Operating within a midterm environment that historically disfavors the party in power, Republicans are defending a narrow 218-214 seat advantage that appears poised to shift toward Democratic control. Ratings from the Cook Political Report list Democrats favored in 220 seats, with 17 designated as toss-ups and another 30 potentially competitive seats leaning toward the GOP.
Most seats that saw narrow margins during the 2024 presidential cycle have shifted toward Democrats, particularly across 10 split-ticket districts that voted for one party’s presidential candidate and the other party’s House nominee. These include seats currently held by Democratic Reps. Adam Gray in California’s 13th District, Nellie Pou in New Jersey’s 9th District, and Marie Gluesenkamp-Perez in Washington’s 3rd District, as well as the seat of retiring Republican Rep. Don Bacon in Nebraska’s 2nd District. AdImpact data shows that Republicans have cut ad reservations in all four of these districts in recent weeks.
Polling indicates Democrats hold a 10-point advantage among registered voters and an 8-point lead with likely voters on the generic congressional ballot, broadening the number of competitive seats before factoring in candidate quality or outside spending. Cost of living remains the foremost concern for voters, driven by rising gas prices, tariffs, and the ongoing war in Iran. These economic challenges coincide with a record number of congressional retirement announcements amplified by an anti-incumbency streak in primary elections.
A wave of mid-decade redistricting, following a Supreme Court decision that rolled back parts of the Voting Rights Act, further scrambled the electoral map. Republicans altered boundaries to introduce more conservative voters into districts held by Democratic Reps. Marcy Kaptur in Ohio’s 9th District, Don Davis in North Carolina’s 1st District, Shomari Figures in Alabama’s 2nd District, and Darren Soto in Florida’s 9th District. Conversely, Democrats enacted similar boundary changes in California targeting seats held by Republican Reps. James Gallagher in the 1st District, David Valadao in the 22nd District, Ken Calvert in the 41st District, Darrell Issa in the 48th District, and independent Kevin Kiley in the 6th District. Among these redrawn areas, only the districts held by Figures and Soto currently favor Republicans.
Heavy investments span dozens of races deemed critical by both parties in the final hours. The most expensive contests feature Michigan’s 7th District and North Carolina’s 1st District, each with planned spending exceeding $12 million. They are followed by Florida’s 14th, 22nd, and 25th Districts; New York’s 17th District; Iowa’s 2nd and 3rd Districts; and numerous toss-up or Democrat-favorable races.
Investment has also reached seats redrawn by Republicans to minimize Democratic voting power, such as Alabama’s 2nd District and Tennessee’s 9th District, alongside districts where voters backed Donald Trump by more than 10 points in 2024, including Kentucky’s 6th District and Arkansas’s 2nd District. Across all 70 races receiving at least six figures in ad spending from both parties, districts voted for Trump by an average of 9 points in 2024. Furthermore, 60 districts are listed as dual priorities for both the Democratic and Republican House campaign arms, reflecting voter dissatisfaction with the Trump administration over the past year.
Not every race is projected to end closely or change party hands. Many districts designated as play targets by the Democratic Congressional Campaign Committee gave Trump close to 60% of the vote in 2024 and have received little to no ad spending from either party.
