Prior to the election, I noticed that there were at least two federal raids at union offices in Philadelphia. These offices doubled as democrat campaign offices and were festooned with HRC campaign posters, etc...and it was interesting to watch the clip of detectives wheeling out files, past the HRC signs.
Anyway, I believe that whatever was causing this federal attention in Philadelphia suppressed their ability/will to commit voter fraud there. It may have been what helped push PA over the edge to a red state.
Also some states had new voter ID laws, and some used ‘cross check’ to prevent fraud.
Cumulatively, all of this ate into her voter pool.
It may have been what helped keep PA a red state this time, despite the typical Dem voter fraud that's made it appear to be a deep blue state for several decades.
There, fixed it fer ya.