We saw with the Wisconsin recounts that only a couple cities had questionable issues and not enough to change the outcome (this time).
We saw in Michigan and Pennsylvania recounts that something more troubling was going on with Detroit and Philly and the real truth got hidden from public view when the recounts were abruptly ended in those places. I think there was evidence for fraud in certain Detroit precincts, but since that fraud involved Democrats, the media was silent on the issue. It got swept under the rug very fast.
I bet if we look harder we find fraud in Dade County, the state of Nevada, the state of Colorado, and also likely Arizona. Lastly, if we are going to be completely honest, California is allowing illegal immigrants vote in large numbers. Mind you, I'm not anti-Democrat, I'm just anti-fraud.
Verifying ID is a huge step towards ending most of the problems we have. The rest is stopping ballot stuffing and corrupt poll workers tossing out ballots.