With control of the U.S. House at stake and Election Day approaching, political campaigns and outside groups have committed about $90 million to advertising in four competitive Pennsylvania congressional races, according to AdImpact, a media-tracking firm. Republican advertisers had spent or reserved about $46.5 million through Friday, compared with $44.1 million for Democrats. The figures cover ad buys and reservations from June through December, so they include planned spending as well as ads already run. The races are in the 1st District, spanning Bucks County and surrounding suburbs; the Lehigh Valley’s 7th; the Scranton-area 8th; and the Harrisburg-based 10th. National party groups are among the leading advertisers as both parties seek seats that could determine the House majority. The 7th District contest between Democratic challenger Bob Brooks and Republican Rep. Ryan Mackenzie is the most expensive. AdImpact counted about $28 million in spending and reservations. Democratic advertisers had committed roughly $10.7 million, led by House Majority PAC; Republican groups had set aside about $17.3 million, led by the Congressional Leadership Fund, a super PAC closely aligned with House Speaker Mike Johnson. Ads from both sides have emphasized affordability. In the 8th District, Democrats are ahead, with about $14.8 million in ad commitments compared with $12.3 million for Republicans. Democrat Paige Cognetti is challenging Republican Rep. Rob Bresnahan. Ads from both campaigns have focused on household costs and support for the middle class. The 1st District race between Republican Rep. Brian Fitzpatrick and Democratic Bucks County Commissioner Bob Harvie has drawn about $13.8 million, making it the least expensive of the four so far. Democrats have committed approximately $8.5 million, against $5.2 million for Republicans. House Majority PAC is the top Democratic advertiser there. Fitzpatrick’s campaign has committed about $4.5 million to advertising between June and December, substantially more than the roughly $460,000 it spent on ads during his 2024 reelection campaign. Some of its ads have accused Harvie of being connected to an FBI corruption investigation. Harvie’s lawyers say he has never been investigated; he testified as a witness in a grand jury proceeding related to a 2022 FBI probe involving Pennsbury School District contracts and political donations. Harvie’s campaign has sought to stop the ads and sued a pro-Fitzpatrick super PAC for defamation. The PAC has asked a court to dismiss the case. Harvie has also used campaign advertising to call for a moratorium on data centers and to criticize Fitzpatrick over affordability. In the 10th District, Democrat Janelle Stelson and Republican Rep. Scott Perry are in a close spending contest. Democrats have committed about $10 million, while Republicans have committed $11.6 million. Perry’s campaign is the top Republican advertiser, and House Majority PAC leads Democratic spending. Perry has run an ad pledging not to raise taxes and describing Democrats as “socialists”; a House Majority PAC ad features a voter criticizing him over rising costs. The four contests are part of a broader battle over House control, and the volume of advertising is likely to rise as Election Day nears. The spending totals show the scale of the political effort, but do not establish how voters will respond to the competing messages.