Democrat Bob Harvie unseats five-term Rep. Brian Fitzpatrick near Philadelphia

The Associated Press has called it: Democrat Bob Harvie, a county commissioner, defeated five-term Republican incumbent U.S. Rep. Brian Fitzpatrick in a battleground House district in Philadelphia's suburbs. The result hands Democrats a seat that had stayed in Republican hands for five straight terms.

Harvie's win marks a hard stop for Fitzpatrick, who had become one of the longer-serving Republicans in a suburban Philadelphia district that both parties fight over every cycle. County commissioner experience gave Harvie a local-government resume to run on in a race where the suburbs were the whole ballgame.

The call comes from AP's Decision Team, which declares a winner only once it's certain the trailing candidate has no remaining path to victory. AP has been tabulating U.S. election results since 1848 and now gathers counts from local election officials across thousands of races nationwide, reporting them as soon as they're available.

AP notes that vote margin shifts at the reporting-unit level reflect two-party vote share — a reminder that in close suburban districts, the map of where votes come from matters as much as the raw total.

With the race decided, Harvie moves from county government to a seat in the U.S. House, while Fitzpatrick's five-term tenure ends. The district, long a bellwether in the Philadelphia suburbs, now sends a Democrat to Washington.