Bob Brooks holds an 86% implied probability in the PA-07 House race because recent polling, including a September Franklin & Marshall survey showing him ahead 45-40% among registered voters, combined with nonpartisan ratings rating the contest toss-up to lean Democratic. The Lehigh Valley district, which Donald Trump carried by under one point in 2024, features heavy outside spending exceeding $28 million, with Democratic groups targeting first-term Republican incumbent Ryan Mackenzie on economic issues. Brooks, who won a competitive May primary after serving as Pennsylvania Professional Fire Fighters Association president, benefits from union support and voter concerns over affordability in this battleground seat critical to House control. Mackenzie emphasizes tax relief and his legislative record, yet faces a polling deficit with roughly three weeks until November 3.