After checking the elected results for Allegheny County, it appears that the county was in control of Democrats for over 15 years. When I lived there, that was never the case. Suffice to say, the Dems are totally corrupt in Pittsburgh.
Republicans more often than not do not even run a candidate for mayor of the City of Pittsburgh. The last Republican mayor in Pittsburgh was in 1934, and it will be a hundred years before the next Republican mayor. Like most big cities, the Dems have destroyed this city. Yes, Pittsburgh went through a renaissance of sorts, but it is nothing remotely like it was. It once was the 3rd largest corporate city in America, behind New York and Chicago, and not that long ago!
Pete Flaherty was the mayor of Pittsburgh through much of my youth, and that is where it got the name Pothole Capital of America. I actually got a flat tire hitting a pothole on my way to my rehearsal for my wedding in 1978. The hole was huge, for my car bottomed out in the hole. UGGGH. Still bad there. I hate going home and driving on those terrible roads.
So, yes the Dems have taken over the county, and as all things under Dem control, the worst of corruption.