Pittsburgh's hotly contested mayoral race is in the spotlight as western Pennsylvanians head to the polls to cast their vote in the primary election. In Pittsburgh, incumbent Mayor Ed Gainey and challenger Allegheny County Controller Corey O'Connor are seeking to win the Democratic nomination.

Challenger Corey O’Connor ousted Pittsburgh Mayor Ed Gainey in Tuesday’s Democratic primary election, beating an incumbent in a race that hinged on how Gainey was handling city finances, affordable housing and public safety.