House Map: Archive Expansion Across Battleground Districts

A batch of archival House polling entered PollingSource's database today fills in gaps from earlier this year and complicates the picture in several races already drawing national attention. The surveys were conducted between February and late August but had not previously been logged, and their late arrival is itself a reminder that public polling of House races often surfaces well after the fact, sometimes only when campaigns or allied groups decide the numbers are worth releasing.

In Pennsylvania, the 1st District produced one of the tighter reads of the batch: an August 23 GQR poll showed Republican Brian Fitzpatrick ahead of Democrat Bob Harvie by a single point, 49% to 48%. That margin is consistent with the district's history as one of the most competitive in the state, though a one-point edge inside a single poll's margin of error tells readers little beyond confirming the race is close. Next door in the 8th District, two summer polls — one from Impact Research, one from Lake Research Partners, both conducted in June — showed Democrat Paige Cognetti with a narrow lead over Republican Rob Bresnahan. Both firms work primarily for Democratic clients, a detail worth keeping in mind when weighing how much independent confirmation these numbers actually provide.

Florida's 13th District offers the sharpest contradiction in today's additions. An August 27 Hart Research survey had Democrat Leela Gray leading Republican Anna Paulina Luna by five points, 51% to 46%. A Public Policy Polling survey from three months earlier showed the opposite result, with Luna ahead 41% to 39%. A nine-point swing in the margin between two polls is too large to write off as ordinary sampling noise; it more plausibly reflects genuine disagreement between pollsters — different likely-voter models, different assumptions about turnout composition — over how competitive this seat actually is. Readers should treat both numbers as data points bracketing a real range of uncertainty rather than converging on a single truth.

Arizona's 6th District was more consistent: two separate 2026 surveys each showed Democrat JoAnna Mendoza leading Republican Juan Ciscomani by three to four points. That degree of agreement across pollsters, even without knowing the full house effects at play, carries more weight than a single outlier reading would.

The most consequential addition for PollingSource's own ratings may be Wisconsin's 3rd District, where a June FM3 Research poll showed Democrat Rebecca Cooke leading Republican Derrick Van Orden 50% to 46%. That result sits uneasily next to PollingSource's current Lean R rating for the race. FM3 is a Democratic-aligned firm, which tempers how much the topline should move the needle, but a four-point Cooke lead — even from a partisan pollster — is a data point the rating will need to account for as more independent surveys arrive this fall.

Taken together, these late-logged polls do not overhaul the House map so much as complicate the confidence with which any of these five races can be called. Pennsylvania's two districts remain within striking distance for both parties. Florida's 13th now carries visibly conflicting evidence rather than a clean trend line. Arizona's 6th shows more agreement than most. And Wisconsin's 3rd stands as the clearest test of whether PollingSource's current rating will hold up against fresher numbers. The lesson for readers is less about any single topline and more about how much the timing and sourcing of a poll shapes what it can responsibly tell us.