I'm tellin ya, watch Michigan this time around. There were a lot of problems exposed on caucus night in heavilly democratic districts. As far as I can tell the problems haven't been fixed.
Watch Philadelphia.
and Pennsylvania, where you don't even need to produce an ID to vote.
And besides the obvious(Wayne County), I'd watch East Lansing, Western Meridian Twp, SE Lansing, Ann Arbor, Ypsilanti, Pittsfield Twp, and Kalamazoo heavily. All are university areas how many know that one must vote where their driver's license is?
2000 had many problems there. So much so that Dianne Byrum was whining about a reVOTE.