Cherelle Parker, a Democrat who has held office at the state and local level after first becoming involved in politics as a teenager, was elected Tuesday as Philadelphia’s 100th mayor, becoming the first woman to hold the post.

Voters were also choosing a new leader for Allegheny County, which is home to Pittsburgh. The races will set the electoral stage for 2024, when the state will be a presidential battleground state, with candidates taking lessons about how Democrats see crime and the strength of progressives in local races. into the next election cycle.

Parker, 51, emerged from a crowded field of Democrats in the May primary and was heavily favored over Republican David Oh in the city, a Democratic stronghold. She will replace Democrat Jim Kenney, who was ineligible for reelection due to term limits.

She campaigned on a promise to make Philadelphia the “safest, cleanest, greenest big city in the nation that will provide access to economic opportunity for all.”