Democrats are professionals at voter fraud.
I think Republicans are learning how to rig elections too.
One of the things I heard about in this election was that some prospective voters were turned away because they didn't live in the 18th District. It seems there was some confusion. A town might have officially been listed as part of the 18th District, but it seems in some towns, only certain sections are part of the district. Others aren't.
I doubt any redrawing of the districts will fix the problem.