Cherelle Parker becomes first woman elected mayor of Philadelphia

Parker, who served for 10 years as state representative, promised to make Philly the safest, cleanest, greenest big city in the nation'

Cherelle Parker was elected as Philadelphia's 100th mayor on Tuesday, 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 Pennsylvania 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.