Bob Brooks holds an 86% implied probability in the PA-07 House race because recent polling averages show him ahead by roughly five points among likely voters, with consistent leads in surveys from Muhlenberg, Siena, and others through late October. The Lehigh Valley district’s narrow Republican lean and 2024 results have shifted under national conditions, including low approval for the incumbent tied to federal policy impacts on fuel costs. Brooks, a retired firefighter and union leader backed by state Democratic figures, consolidated his primary and benefits from higher favorability in key demographics. Mackenzie, the first-term Republican, faces headwinds from heavy outside spending against him and negative campaign exchanges that prompted Brooks to cancel the planned debate. Forecasters have moved the seat from toss-up to lean Democratic in recent updates, aligning with the market consensus ahead of the November 3 election.