King County, Washington, is unique when it comes to elections in many ways, most of them surrounding the recent hand recount for Governor there. There is one way in which it stands out which you may not be aware of, though. King County is one of the only large counties, perhaps singular, where a complete canvass of the election including a precinct-by-precinct breakdown of the absentee vote is provided.
In the case of fraud, the presence of two separate voting systems complicates the job of a vote-rigger -- any "adjustment" made to one system in a small set of precincts would have to be compensated for in the other system to avoid creating anomolies. We should be as wary of calls for a more "unified" voting system as we are of calls to do away with exit polling. Such would rob us of a valuable tool for verifying the integrity of an election.
Read the entire article at http://abrij.org/~bri/my2c/wabs.html.
Note: lots of graphics, not meant for pocket-sized screens.