The answer is quite simple, thought not "politically correct". Put dedicated poll watchers in all predominately democRAT districts, at least they'll be kept quite busy (where they're (poll watchers) likely to die of boredom in Republican/conservative areas). It is a well known (and documented) FACT that the highest percentage of voter FRAUD occurs in these (liberal/RAT) areas.
Don't blame me, I just call 'em as I see 'em.
The problem is not so much what happens at the polling places but what happens in the counting rooms.