70 House Districts Draw Heavy Ad Spend

Seventy House districts have seen at least six figures in ad spending from both parties in the final days of the 2026 midterm campaign. This spending surge indicates a highly competitive environment for the November 3 election. The core battle is no longer about whether Democrats can stop a Republican wave, but rather how much ground they will gain.

The Cook Political Report currently lists Democrats as favored in 220 seats. It identifies 17 races as toss-ups and another 30 as potentially competitive but leaning toward the Republican Party. Republicans currently hold a narrow 218-214 seat advantage in the chamber. However, the latest polling suggests this control is at risk. An NPR, PBS News, and Marist poll found Democrats hold a 10-point advantage among registered voters. That lead shrinks to 8 points among likely voters on the generic congressional ballot.

Specific districts have attracted the largest financial investments. Michigan’s 7th District and North Carolina’s 1st District each have more than $12 million in planned spending. Other high-cost races include Florida’s 14th, 22nd, and 25th Districts. New York’s 17th District and Iowa’s 2nd and 3rd Districts also feature heavy ad buys. These districts are considered critical for determining the final balance of power.

Redistricting has significantly altered the map for this election cycle. A Supreme Court decision that rolled back parts of the Voting Rights Act led to mid-decade boundary changes. Republicans shifted lines to add more conservative voters into districts held by Democrats. This strategy affected the seats of Rep. Marcy Kaptur in Ohio, Rep. Don Davis in North Carolina, Rep. Shomari Figures in Alabama, and Rep. Darren Soto in Florida. Only Figures and Soto are in districts currently rated as favoring Republicans.

Democrats also redrew maps in California to benefit their party. This change impacts districts currently held by Republican Reps. James Gallagher, David Valadao, Ken Calvert, and Darrell Issa, as well as independent Rep. Kevin Kiley. In the 10 districts that voted for one party’s presidential candidate and the other party’s House nominee in 2024, the balance has shifted toward Democrats. This includes seats held by Reps. Adam Gray, Nellie Pou, and Marie Gluesenkamp-Perez, and the retiring district of Rep. Don Bacon.

Voters are prioritizing cost of living issues in this election. Rising gas prices, new tariffs, and the ongoing war in Iran contribute to economic concerns. A record number of congressional retirement announcements has also amplified anti-incumbency sentiment. Primary elections have already shown this trend as challengers unseat long-time incumbents. The 70 districts with heavy six-figure ad spending voted for former President Donald Trump by an average of 9 points in the 2024 election.

The Democratic Congressional Campaign Committee has identified several districts as priorities that voted for Trump by closer to 60 percent in 2024. These specific races have seen little to no ad spending from either party. Meanwhile, 60 districts are listed as priorities by both the Democratic and Republican House campaign arms. This overlap reflects the high stakes of the upcoming vote. The spending data confirms that both parties view these specific contests as the decisive battlegrounds for the 119th Congress.