Democratic challenger Bob Brooks holds an 87% implied probability in the PA-07 race, reflecting trader assessment of his polling edge and structural advantages in the Lehigh Valley swing district. A late-September Franklin & Marshall poll showed Brooks ahead of Republican incumbent Ryan Mackenzie 45-40 among registered voters, with Brooks performing strongly among independents and moderates amid low presidential approval and voter concerns over costs. Mackenzie flipped the seat by a narrow margin in 2024, but forecasters have since shifted the contest to lean Democratic following that survey and national midterm dynamics. Early voting and mail ballots are underway ahead of the November 3 election, with both campaigns emphasizing economic issues and turnout among working-class voters.