Bob Brooks holds an 86% implied probability in the PA-07 House race as recent polling shows the Democrat leading incumbent Ryan Mackenzie by 5 points among registered voters, with a 16% undecided share that could expand his edge among independents and moderates in the Lehigh Valley battleground. The district's narrow 2024 Republican margin and toss-up or lean-D ratings from forecasters reflect its even partisan split and large unaffiliated population, amplifying the impact of Brooks' union-backed primary victory and focus on affordability and working-class issues. Mackenzie's reelection bid centers on tax relief and his first-term record, yet trader consensus has priced in a Democratic advantage consistent with national midterm patterns and the seat's vulnerability. The November 3 general election remains the resolution trigger.