Incumbent Ed Gainey and challenger Corey O'Connor were on the ballot in Pittsburgh's Democratic primary for mayor.

Corey O'Connor's victory in Pittsburgh's Democratic primary marks a significant shift in the city's political landscape, with ...

Corey O’Connor has ousted Pittsburgh Mayor Ed Gainey in a Democratic primary. The campaign hinged on how Gainey was handling ...

Corey O'Connor derailed Mayor Ed Gainey's hopes for a second term with a promise to move the city forward. Only hours after ...

Corey O'Connor defeats Pittsburgh Mayor Ed Gainey in Democratic primary that hinged on housing and public safety.

Pittsburgh Mayoral Candidate Corey O’Connor took to the streets to thank voters for his victory in the Democratic primary.

Allegheny County Controller Corey O’Connor has beaten Pittsburgh Mayor Ed Gainey and will now run to be the city's next mayor ...

Corey O'Connor wins the Democratic mayoral primary in Pittsburgh and carries a "Thank You" sign through the streets.

UPDATE 10:05 p.m.: Corey O’Connor wins the Democratic primary for Pittsburgh mayor, according to the Associated Press. UPDATE ...

In the pouring rain, O'Connor paid tribute to what his father, Bob, did 20 years ago after he won his own election.